Dynamic headspace sampling. Medical search. Frequent questions

Dr. Raynie's research interests include high-resolution chromatography (including high-temperature LC and SFC), chromatographic sample preparation (including ASE, SFE, SPME, and SPE), chromatography theory, green chemistry, and problem-based learning in analytical chemistry. (eas.org)
Combine with any of the 1-day Hands-on sample preparation courses covering Liquid-Liquid Extraction (LLE), Derivatisation, Solid-Phase Extraction (SPE), Solid-Phase Micro-Extraction (SPME), Thermal Desorption, Pyrolysis and Purge-and-Trap - see the Anthias website for further details and prices. (rsc.org)
The system is equipped with a robotic sample preparation device from Gerstel enabling fully automated one - and two-step derivatization procedures, SPME, headspace and dynamic headspace analysis, as well as thermodesorption. (boku.ac.at)
A method for the quantitative analysis of 9 polycyclic and nitro musk fragrances from fish samples by PAL SPME Arrow and GC-MS/MS has been developed. (palsystem.com)
Solid Phase Microextraction (SPME) is a sampling technique that uses a thin polymer fiber with a hydrophobic coating. (cdc.gov)
During headspace exposure (the "extraction" step), the gaseous derivatized Hg species adsorbs onto the PDMS coating of the SPME fiber. (cdc.gov)
After a predetermined time, the SPME fiber is retracted into the injection needle, and the needle is withdrawn from the sample vial. (cdc.gov)
Increase laboratory performance with advanced sample handling, automated liquid sampling, fixed headspace, dynamic headspace with In-Tube Extraction, and also SPME sampling and also shot. (fundsaccessdocs.com)
We also describe a procedure for metabolome-based BVC profiling via dynamic (i.e., continuous airflow) or static headspace sampling using solid-phase microextraction (SPME). (hal.science)
By combining HS-SPME using NiTi- LDH /GO nanostructure fiber and GC-MS, low LODs can be achieved which can be used for determining phenols from water samples. (nanochemres.org)

4. Extraction from Liquid Samples a. (eas.org)
5. Extraction from Solid Samples a. (eas.org)
8. Post-Extraction Sample Handling a. (eas.org)
Direct Thermal Extraction - Analysis of low moisture solid matrix samples by thermally extracting the volatile and semi-volatile organics directly from the solid matrix without the use of solvents or other sample preparation. (sisweb.com)
Pharmaceuticals - The analysis of residual solvents in pharmaceuticals is an excellent application of the Direct Thermal Extraction Technique in which volatiles are thermally extracted directly from solid pharmaceutical samples without the use of solvents or other sample preparation. (sisweb.com)
The sample is thermostated and agitated while the headspace is purged with a controlled flow of inert gas, providing controlled and efficient extraction conditions. (davinci-ls.com)
Extraction of the crushed and non-crushed rectal gland samples afforded the same range of compounds, however, the crushed glands provided higher concentrations of each compound. (edu.au)
No wet chemical sample preparation or extraction or clean-up is required. (palsystem.com)
1398). 'On-line Coupling of Dynamic Headspace Extraction and Ion Mobility Spectrometry for Evaluating Oxidation in Sesame Oil', فصلنامه علمی زیست فناوری گیاهان زراعی , 6(2), pp. 33-38. (ac.ir)
In this paper, a simple, sensitive and economical method is described for the extraction and determination of sesame oil oxidation by dynamic headspace extraction combined to ion mobility spectrometry (IMS). (ac.ir)
In headspace analysis, the higher the extraction temperature the more sample types that can be analyzed. (hamiltoncompany.com)
The following analytical merits were used under optimal conditions: temperature of extraction: 80 ºC, desorption duration: 2 min, extraction time: 40 min, temperature time: 270 oC, salt concentration: 10% (w/v), 0.01-100 µg L-1 and 0.004-0.09 ng mL-1 for dynamic linear rang (DLR) and limit of detection (LOD), respectively. (nanochemres.org)

The DHS option efficiently extracts and concentrates VOCs from liquid or solid samples placed in standard 10 mL or 20 mL headspace vials (DHS) or in larger sample containers (250 mL, 500 mL or 1 L) using the the DHSLarge extension. (davinci-ls.com)
Test portions of the sample go directly into sample vials for automated analysis of large sample series on the PAL System with unmatched sample capacity. (palsystem.com)
For different sample capacity please check 3100A (15 vials) or 3200A (209 vials). (hta-it.com)

Tubes are fitted with individual adapters enabling both automated movement and leak-free sealing during the dynamic headspace and thermal desorption steps and during storage in the autosampler tray. (davinci-ls.com)
When linked to the TriPlus RSH SMART Autosampler, this software enables quick programs of typical sample prep work steps, with automation of daily sample handling procedures along with even more complex sample preparation treatments. (fundsaccessdocs.com)
The headspace autosampler works by heating up a known volume or mass of sample is a gas-tight vial and the act of heating forces the equilibrium of the analyte into the gas phase leaving the much less volatile sample matrix. (fundsaccessdocs.com)
3000A is the most compact autosampler in the market (no requirement for additional bench space) while offering top-class sample capacity. (hta-it.com)

Aroma compounds were isolated by dynamic headspace sampling, quantified by gas chromatography, and identified by gas chromatography-mass spectroscopy. (usda.gov)
Headspace gas chromatography/ mass spectroscopy is the analysis of the volatile and semi-volatile organic compounds given off by a sample during heating or over time. (innovatechlabs.com)
Nuclear Magnetic Resonance (NMR), dynamic headspace sampling coupled with gas chromatography-mass spectrometry were employed to study how different roasting times affected formation of compounds within coffee beans during roasting. (sveacafe.co.uk)
High-efficiency headspace sampling of volatile organic compounds in explosives using capillary microextraction of volatiles (CMV) coupled to gas chromatography-mass spectrometry (GC-MS) . 406:2189-2195. (fiu.edu)
Using gas chromatography-mass spectrometry (GCMS), the MDH Public Health Laboratory (PHL) analyzed 46 THC-containing e-cigarette, or vaping, products obtained from 12 EVALI patients for various potential toxicants, including vitamin E acetate, which has recently been detected in some THC-containing products and in samples of lung fluid from EVALI patients ( 1 - 4 ). (cdc.gov)

Dynamic Headspace Purging - Analysis of the volatile organics from large solid or liquid samples, such as vegetation, arson analysis, flowers and growing plants using adsorbent traps to trap the volatiles for subsequent thermal desorption analysis. (sisweb.com)
Purge and Trap - The purging of volatiles from liquid samples using clean carrier gases, trapping the volatiles on adsorbent resins traps for analysis via the thermal desorption system. (sisweb.com)
Purge and Trap of Solid Samples - Clean carrier gas is used to purge the volatiles from solid matrix samples, trapping the organics on an adsorbent resins trap for analysis via the thermal desorption system. (sisweb.com)
Quantification - All the above techniques can be used to quantitate the volatiles in these samples. (sisweb.com)
Headspace collection of the gland volatiles was also investigated using static and dynamic methods. (edu.au)
Analysis methods for volatiles are the direct sampling of an aliquot of the sample headspace (static headspace analysis), or a concentration of the analytes before measurement ( dynamic headspace analysis ) if the compounds are of low concentration or less volatile (semi volatile organic carbons, SVOCs). (palsystem.com)

This PhD thesis also examined the most common techniques for sampling rectal glands and headspace volatile compounds of fruit flies, using B. tryoni as a model organism as it has been studied previously for its chemistry. (edu.au)
Six new compounds that have not been reported in previous studies, ethyl propanoate, ethyl isobutyrate, ethyl 2-methylbutanoate, propyl isobutyrate, ethyl 2-methylpentanoate and diethyl succinate, were identified in the male rectal glands and headspace samples, along with six previously reported amides. (edu.au)
Three new compounds, propyl laurate, methyl myristate and N -(2-methylbutyl)acetamide, were also identified in female rectal glands and headspace samples, as well as nineteen compounds previously reported including fatty acid esters, spiroacetals and amides. (edu.au)
Gas chromatography headspace (GC/Headspace) is a technique used in analytical chemistry to analyze volatile compounds present in a sample. (labrulez.com)
Static Headspace analysis is a time-tested and robust technique for the analysis of volatile compounds in almost any matrix. (laboratoryanalysers.com.au)
On the PAL System, both of the headspace analysis modes offer the easiest approach from sample to results for a wide variety of volatile compounds. (palsystem.com)
The typical sensitivity for compounds analyzed by dynamic analysis is a nanogram per gram. (innovatechlabs.com)
This new needle design was tested alongside the High Dynamic (HD) spring loaded plunger to a temperature of 200°C. The resulting syringe design almost doubled the headspace operating temperature and opened up a new world of compounds from analysis. (hamiltoncompany.com)
PTR-MS (Proton Transfer Reaction - Mass Spectrometry) is the benchmark method for simultaneous real-time monitoring of volatile (organic) compounds (VOCs) without sample preparation in very low concentrations. (ionicon.com)
NiTi-LDH/GO was used as a fiber coating for the determination of phenolic compounds for headspace solid‐phase microextraction methods in water samples. (nanochemres.org)

Unlike all other purge-and-trap or dynamic headspace type systems, the GERSTEL DHS can automatically select which trap to use for each sample if desired. (davinci-ls.com)
The automated ITEX Dynamic Headspace unit demonstrated equivalent accuracy and precision when compared to purge and trap and overall was more sensitive than the other enrichment techniques. (palsystem.com)
This type of headspace analysis uses a "purge and trap" method where the sample is placed in a heated vessel and the vessel is purged with a gas. (innovatechlabs.com)

While the static headspace analysis takes an aliquot of gas after a sample/headspace equilibrium is reached, the dynamic method collects as much as possible of the analytes of interest before injection. (palsystem.com)
As opposed to introducing a liquid aliquot of sample remove to be vaporised in the GC system, the headspace sampler presents a sample aliquot already in the gas stage. (fundsaccessdocs.com)
Release of an unfiltered 45 mL headspace aliquot within the NIOSH chamber was calculated to produce a concentration of 0.8 ppmv based on the Henry's constant, which is right at the instrumental LOQ. (cdc.gov)

The use of identical sample preparation robots for derivatization on both GC instruments allows simple and easy transfer of methods between GC-MS/MS and GC-QTOFMS. (boku.ac.at)
This type of chemical derivatization results in loss of ionic charge and reduced polarity making each mercury species molecule volatile so that it can escape the liquid phase and accumulate in the gaseous phase ("headspace") directly above the sample. (cdc.gov)

For the dynamic methods, the performance of two common sorbent polymers, Tenax-GR and PoraPak Q, and the effect of sampling duration on performance of each sorbent, were also examined. (edu.au)
The built-in trap also expands the capability to use a reactant gas (like oxygen and air), and perform thermal desorption on sorbent tubes or larger samples. (go-jsb.com)

The DHS option extracts and concentrates VOCs from liquid or solid samples placed in a wide range of sample vessels and is becoming the technique of choice for a wide range of analyses. (davinci-ls.com)
The sample is heated to a specific temperature to facilitate the release of VOCs from the sample into the headspace part. (labrulez.com)
The defined portion of headspace sample is then introduced into the GC system where the VOCs are separated on chromatography column and detected using various detection methods, such as flame ionization detection (FID) or mass spectrometry (MS) . (labrulez.com)
Use of a test solution containing two VOCs with differences in ratios of VOC concentrations in the headspace and liquid enables source apportionment of leaked material. (cdc.gov)
SIFT-MS was used to detect VOCs from liquid and headspace leaks in the vapor phase. (cdc.gov)

Because the headspace is in close relationship with the concentration of solvents in the material, the true drying process end point can be determined by analyzing the headspace vapors. (process-insights.com)
For these experiments, PAA vapors were swept directly from the headspace above a PAA solution into our generation system. (cdc.gov)
Liquid drops of PGME solutions and headspace vapors above PGME solutions were released to simulate leaks from CSTDs. (cdc.gov)
A method for measuring peracetic acid vapors in air using impinger sampling and field-portable colorimetric analysis is presented. (cdc.gov)

Air Sampling - Analysis of indoor and outdoor air by trapping the volatile organics in air on an adsorbent trap and then using the thermal desorption system to desorb the organics into the GC for analysis. (sisweb.com)
The unique interfacing design permits a direct pyrolysis path to the GC inlet or rapid sample heating and transfer to the trap without interrupting the pneumatics of the GC. (analytix.co.uk)
In common for both methods is the way of analysis by GC or GC/MS. Usually, one dedicated headspace or purge & trap unit was required for each of the static and dynamic headspace analyses. (palsystem.com)

Optimize sampling for ambient pressures, vacuum drying, and lyophilizers using our CRDS trace-level, low-pressure moisture analyzer for Lyophilization, HALO RP or HALO QRP . (process-insights.com)
sampling and injection method, reducing stress to septa, minimize the contamination of the analyzer, while prep-run support have been implemented to reduce carrier gas consumption and consequently both operations costs and environmental impact. (hta-it.com)
Therefore, the sensitivity of the method was not adequate to determine leaks of PGME vapor from a headspace release through an air filtering CSTD when using the draft NIOSH testing protocols with an FTIR analyzer. (cdc.gov)

The headspace is the gas phase that exists above a sample in a closed vessel . (labrulez.com)

Since the correspondence of in-solution and gas-phase structures cannot be granted, we have also included dynamic light scattering (DLS) analyses of in-solution oligomeric distributions. (nature.com)

Sample temperatures can be selected from 10 °C to 200 °C. Lowering the temperature provides a means of reducing the amount of water vapor released and ultimately re-trapped. (davinci-ls.com)
In the DHS L 3.5+, samples are placed in individual inert chambers with a volume of up to 1 Liter at a defined temperature and gas flow. (davinci-ls.com)
Analytical runs may be programmed up to ten steps per sample from ambient to 1400°C with automatic control of the on-line valve, interface temperature, and GC ready/start for each step. (analytix.co.uk)
Its ability to embellish sample test accounts make it ideal for all industries ranging from plastics as well as petroleum items to pharmaceuticals and chemicals.The maximum testing temperature level can be set to 300 ° C. It additionally allows for enhanced control over screening temperature levels across the range of the instrument. (fundsaccessdocs.com)
In this analysis, a liquid or solid sample is placed in a vial, sealed and heated to a specific temperature so that the volatile components escape into the headspace above the sample. (innovatechlabs.com)

The goal of the experimental design and research presented herein was to produce peracetic acid (PAA) atmospheres suitable for evaluating PAA sampling methods in a controlled environment. (cdc.gov)
The capture efficiency of aqueous media in glass and plastic impingers was evaluated when used for peracetic acid vapor sampling. (cdc.gov)
This impinger sampling method presented herein allows for an easy to use and rapid in-field measurement that can be used for evaluating occupational exposure to peracetic acid. (cdc.gov)

When other factors are held constant, the adsorbed mass increases as a function of sample concentration. (cdc.gov)
A major advantage of PTR-MS is that the samples do not need to be prepared before the measurement (e.g. pre-concentration or chemical separation procedures), thus whole-air samples can be introduced directly into the drift tube allowing for dynamic headspace sampling or VOC flux measurements. (ionicon.com)
The detection capabilities are beneficial for dynamic processes such as solvent drying, in which it is desirable to analyze a component over a large concentration range. (process-insights.com)
A gas sample of fluorine, the concentration levels of which are to be evaluated is flowed through the cell. (patsnap.com)
Means are provided for measuring the said photomultiplier output signal and relating same to the fluorine concentration of the gas sample provided to the cell. (patsnap.com)
The flow rate of the air sweeping the headspace was varied to achieve the desired concentration after dilution into the carrier gas stream. (cdc.gov)
The ability to maintain the concentration of PAA in the headspace above the solution is limited by the kinetics at the PAA solution-air interface. (cdc.gov)

This short course is designed to provide participants with an in-depth understanding of the role of sampling and sample preparation in analytical chemistry, especially as related to chromatography. (eas.org)

Direct Analysis of Liquid Samples - Liquid samples such as oils or perfumes can be directly injected into adsorbent resin traps. (sisweb.com)

CSTDs may leak liquid, headspace, or a mixture of the two. (cdc.gov)

It handles the most sophisticated techniques about sampling (ambient headspace, multi-phase, small volume and controlled speeds to work with a wide range of sample viscosities), injection (priority, with the internal standard technique, dual simultaneous injections in high-throughput and confirmation mode) and syringe washes (with sample or with solvent, single or double wash step capability). (hta-it.com)

Criteria included sufficient volatility to evaporate from aqueous liquid leaks efficiently, a Henry's constant which produced sufficient vapor phase concentrations to make headspace leaks detectable, and suitability for detection using a low-cost detection system. (cdc.gov)

Discover all injection techniques, micromethods and sample prep options. (palsystem.com)
Other sampling options are available that makes the system much more than a polymer GC introduction system and can be considered as a thermal injection system for all matrices. (analytix.co.uk)

The MAESTRO software combined with the Agilent ChemStation controls the complete process from sample introduction through thermal desorption to GC/MS analysis with one method and one sequence table ensuring efficient and error-free operation. (davinci-ls.com)

The quantification of InHg, MeHg, and EtHg in whole blood samples is performed using a triple spike isotope dilution (TSID) method employing gas chromatography (GC) to separate the species followed by introduction into an ICP-DRC-MS for detection. (cdc.gov)
Obviously, repeatability of the whole analytical workfl ow, including sample preparation, sample introduction, separation and detection, is hereby of the utmost importance. (gerstelus.com)
A gaseous fluorine detection system is provided which includes a generally enclosed sample cell containing a substrate comprising a material which interacts with fluorine gas to generate radiant energy. (patsnap.com)
The Limits of Detection for the glass and plastic impingers were 0.24mg/m(3) and 0.28mg/m(3), respectively, for a 15L air sample. (cdc.gov)

The research team, based mainly in Basel, Switzerland, said its novel secondary electrospray ionization-high resolution mass spectrometry (SESI-HRMS) platform allowed for headspace analysis of both immature and activated DCs in real time. (chromatographyonline.com)
Both liquid and gas chromatography coupled to mass spectrometry (LC-MS and GC-MS, respectively) have been used in targeted and untargeted experiments but require the use of isotopically labeled substrates to glean information on the dynamic processes of DCs. (chromatographyonline.com)
SIFT-MS or IMR-MS) PTR-MS does not dilute low concentrated samples by a carrier gas and does not lose precursor ions on their way through a mass filter between the ion source and the drift tube. (ionicon.com)
During my six-month internship, I have to develop the Multi-Volatile Method (MVM) by Dynamic Headspace Sampling and Gas Chromatography coupled by Mass Spectrometry (DHS-GC-MS) on alternative matrices. (anatune.co.uk)
In a solvent drying process, the MAX300-LG high performance quadrupole process mass spectrometer monitors the atmospheric composition of the headspace above the drying material. (process-insights.com)

A fast, efficient method for analyzing solid samples. (sisweb.com)
Liquid, gaseous and solid samples work well with GC-MS analysis. (spectrophotometers.com)

Many typical manual sample preparation steps can be moved to a PAL System providing cost-effective analytical methods that utilize streamlined workflows for improved reliability, consistent performance, and unattended operation. (palsystem.com)
In GC headspace, a small portion of the headspace is extracted from the sample container and introduced into the GC system for analysis. (labrulez.com)
Teledyne Tekmar draws on our experience as a leader in low-level VOC analysis with the introduction of a next generation Headspace instrument, the HT3™ Static and Dynamic Headspace System. (laboratoryanalysers.com.au)
For static and for dynamic headspace analysis only a dedicated tool is inserted into the PAL System and can be used immediately. (palsystem.com)
According to the study, DCs sample and present antigens to immune system cells in animals, making them indispensable in terms of immune and memory function, but there are some limitations in the quantitation of their metabolomes, like labor-intensive sample preparation (1). (chromatographyonline.com)
Promotes and increases the awareness about the headspace system project for assisting the young adults and teenagers. (myassignmenthelp.com)
The proper marketing and promotion of the system would assist the headspace authorities to gain access to more young adults and teenagers for their well being. (myassignmenthelp.com)
Determines and allocates the budget required for each of the activities in system implementation for headspace. (myassignmenthelp.com)
The quality and completion time of the headspace system project is dependent on the budget allocation. (myassignmenthelp.com)
Project manager acts a medium between the client and project team for guiding the project team for completing the system development ensuring the needs of the headspace authorities. (myassignmenthelp.com)
The business analyst in this project is responsible for determining the needs and requirement of the headspace that can be obtained through the system development. (myassignmenthelp.com)
Provides complete sponsorship for the headspace system development. (myassignmenthelp.com)
Items of mail are rapidly processed in a mail sampling system to determine if the mail is contaminated with a chemical or biological agent. (patsnap.com)
The mail sampling system maintains a negative pressure in a containment chamber and includes a triggering sampler that makes a threshold determination regarding possible contamination, and a detecting sampler that obtains a sample for more detailed analysis in response to a signal from the triggering sampler. (patsnap.com)
A sample of particulates collected from an item of mail is either removed for analysis or analyzed in the system to identify a contaminating agent. (patsnap.com)
Optionally, the system includes an archiving sampler, which archives samples for subsequent processing and analysis, and a decontamination system, which is activated to decontaminate the mail if needed. (patsnap.com)
A practical solution was achieved using a PAA delivery system where air was passed through the headspace above a PAA solution in a vial. (cdc.gov)
A system to differentiate and quantify liquid and headspace vapor leaks from closed system drug-transfer devices (CSTDs) is presented. (cdc.gov)

Dramatic improvements in sensitivity are achieved with the new Dynamic Headspace option, while maintaining the ruggedness and reliability of a traditional Static Headspace instrument. (laboratoryanalysers.com.au)

Upon successful completion of the course, the participant will understand sampling considerations and approaches, and an overview of sample preparation strategies. (eas.org)
Laboratory technicians and managers, especially those interesting in learning when to apply different sample preparation techniques and exploring new sample preparation methodology. (eas.org)
Why sample preparation b. (eas.org)
He is recipient of the L.S. Palmer Award from the Minnesota Chromatography Forum and is author of the Sample Preparation Perspectives column for LC/GC. (eas.org)
Learn the theory and gain practical experience of how to use Headspace as an automated sample preparation technique for GC or GC-MS. This one day course covers the theory of static and dynamic headspace and how to modify samples to improve results, then using this knowledge to create methods, analyse samples and experiment with parameters to see the effects. (rsc.org)
Versatile automated sample preparation. (boku.ac.at)
Conveniently produce as well as evaluate sample preparation approaches with the Thermo Scientific TriPlus RSH Tasting Operations Editor Software Program. (fundsaccessdocs.com)
In this respect, automation of the sample preparation is very useful in order to reduce the analytical variability. (gerstelus.com)
In a series of articles, we describe the use of the GERSTEL MPS WorkStation for automated sample preparation applied to metabolomics studies. (gerstelus.com)
These methods also have sample preparation drawbacks, in terms of time. (chromatographyonline.com)
Combined with HRMS, the team said this approach is proven to be faster, more sensitive, noninvasive, and able to be performed in real time with minimal sample preparation (1). (chromatographyonline.com)
and no sample preparation is necessary. (ionicon.com)
Not only do I develop my skills in instrumentation (GC-MS) and sample preparation, but also in communication and computer science! (anatune.co.uk)
One of the charms of Element is the sample preparation. (anatune.co.uk)

The DHS option is completely controlled by GERSTEL MAESTRO software which provides simple method and sequence set-up and parallel processing for over 100 samples. (davinci-ls.com)
The first step of this method involves the addition ("spiking") of enriched isotopes ( 199 Hg 2+ , CH 3 200 Hg + , and C 2 H 5 201 Hg + or C 2 H 5 198 Hg + , 199 Hg 2 , and CH 3 201 Hg + ) to the blood sample. (cdc.gov)
The recovery results for spiked samples (90.0-104.0%) demonstrated the potential of the proposed method for determining of oxidation in sesame oil samples. (ac.ir)
Dynamic PAA atmospheres which are flowing and continuously refreshed are the preferred method for exposing samplers to equivalent atmospheres. (cdc.gov)

Displacement of 45 mL of vial headspace containing PGME vapor is the largest amount expected when using the draft NIOSH testing protocol. (cdc.gov)

In Gas Chromatography (GC), a sample is volatilized and carried by an inert gas through a coated glass capillary column. (spectrophotometers.com)

For the 6200 a unique one-shot autoinjector is included that consists of a 'Drop in Sample Chamber' (DISC) that eliminates the need to insert the sample tube into the coil probe. (analytix.co.uk)

The results from the dynamic methods showed that Tenax was more suitable for amides and esters except ethyl isobutyrate. (edu.au)
TSID measures individual chemical species (inorganic, methyl and ethyl mercury species) in samples using ID principles. (cdc.gov)

Measurements of air contaminants previously made by the company were all within acceptable limits with the exception of toluene- diisocyanate (584849) (TDI) which was recorded at 0.1 part per million in the highest sample taken. (cdc.gov)

Sampling duration was a critical factor for the dynamic headspace methods. (edu.au)

Samples can be analyzed in one automated sequence using one or more methods. (davinci-ls.com)
These studies show that when interpreting volatile profiles of fruit flies, and when comparing species, it is important to consider the biases that can be introduced by sampling methods. (edu.au)
Alternative methods of structure analysis that would provide experimental insight into each of the co-existing species and their dynamic nature need to be explored. (nature.com)
To avoid interrupting the process (traditional methods to determine the drying process involved sampling and analyzing the product in a lab) and possible contamination of an entire batch, many producers choose to overextend the drying process. (process-insights.com)

Do you use or want to use the Headspace technique in gas chromatography? (labrulez.com)
The technique is also non-destructive , which means that the sample can be retained for further analysis. (labrulez.com)
The popularity of the technique is due to Headspace analysis providing a clean, reliable result. (laboratoryanalysers.com.au)
As soon as an approach is developed, the user can personalize the automation sequence samples for the technique. (fundsaccessdocs.com)

Daily life functions are often performed under more challenging conditions than is the case for formal neuropsychological testing (eg, distractions, need for dual or multitasking, continuous dynamic computations using output from previous operations, need for self-initiation and self-organization) and may involve larger areas of space than a paper-and-pencil task on a tabletop (eg, navigating in an airport or mall, playing baseball, driving). (medscape.com)

Sample probes are available in a variety of designs and sizes including a flat ribbon probe where the sample is placed directly on the platinum for pyrotomy studies, and a coil probe where solid and liquid samples are placed into quartz tubes before inserting into the platinum filament. (analytix.co.uk)
For liquids and gases, the sample is commonly directly injected the GC. (spectrophotometers.com)

Static and dynamic headspace sampling b. (eas.org)

Using reduced sample volumes makes it possible to avoid dilution and evaporation, and even work completely solventless and online. (palsystem.com)

The samples can be subsequently thermally desorbed into the GC for analysis. (sisweb.com)

Anatomy3

Organisms3

Chemicals and Drugs36

Analytical, Diagnostic and Therapeutic Techniques and Equipment14

Psychiatry and Psychology1

Phenomena and Processes6

Disciplines and Occupations2

Anthropology, Education, Sociology and Social Phenomena2

Technology, Industry, Agriculture6

Health Care11

SPME10

Extraction12

Vials3

Autosampler4

Chromatography-mass5

Volatiles6

Compounds10

Purge and Trap3

Aliquot3

Derivatization2

Sorbent2

VOCs5

Vapors4

Trap3

Analyzer3

Vessel1

Analyses1

Temperature5

Peracetic acid3

Concentration7

Analytical chemistry1

Adsorbent1

Leak1

Ambient1

Concentrations1

Injection2

Thermal1

Detection4

Mass5

Solid Samples2

System18

Sensitivity1

Preparation14

Method4

NIOSH1

Inert gas1

Chamber1

Ethyl2

Measurements1

Duration1

Methods4

Technique4

Continuous1

Directly2

Static and dynamic1

Evaporation1

Subsequently1