Chemicals and DrugsAnalytical, Diagnostic and Therapeutic Techniques and EquipmentPhenomena and ProcessesDisciplines and OccupationsInformation Science
Chemistry, AnalyticChemistry Techniques, AnalyticalSpectrometry, Mass, Electrospray IonizationMass SpectrometryPhenindioneTandem Mass SpectrometryChromatography, LiquidChromatography, High Pressure LiquidSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationCyclotronsFourier AnalysisSpectroscopy, Fourier Transform InfraredIons
Desorption electrospray ionization massHigh performance liInductively Coupled PlasTime-of-Flight MaRapid CommunicatioCharacterizationMetabolomicsSeparationDESIQuantificationSpectrometerMetabolitesAtmospheric pressure cMorphology2021PeptidesPurdue University2017AnalysisDerivatizationBiochemistryCapillary electrophoresisMethods2023ImagingMatrix-assisted l2018CompoundsStructuralAerosolMethodDeterminationProtein1999AssayScientists2001WorkflowIonsDepartment of ChemisSynthesisCombinationDetectionEnvironmental ChemistryJournalSpectraLund University
Desorption electrospray ionization mass2
  • By utilizing a cutting-edge technique called desorption electrospray ionization mass spectrometry imaging (DESI-MSI), they have identified diacylglycerols as potent biomarkers for the rapid detection of breast cancer. (chromatographyonline.com)
  • Reactive desorption electrospray ionization mass spectrometry (reactive-DESI-MS) was used for direct analysis of EDTA on concrete samples. (hal.science)
High performance li4
  • The process was continuously monitored focusing on the identification, mass spectrometry and elucidation of its by-pro- ducts by applying direct infusion and high performance liquid chromatography, electrospray ionization high resolution mass spectrometry, in the negative ion mode. (scirp.org)
  • A high-performance liquid chromatography-tandem mass spectrometric (HPLC-MS-MS) method is presented and evaluated for the determination of S-benzylmercapturic acid (S-BMA) and S-phenylmercapturic acid (S-PMA) in human urine. (cdc.gov)
  • TSA (50 μM) was readily and completely metabolized by rat hepatocytes in suspension (2 × 10 6 cells/ml), whereafter its phase I metabolites were separated by high-performance liquid chromatography and detected with simultaneous UV and electrospray ionization mass spectrometry (ESI-MS). ESI tandem mass spectrometry (ESI-MS/MS) was used to identify the metabolites. (aspetjournals.org)
  • Zhang Y, Wang Q, Zhang G, Jia W, Ren Y, Wu Y. Biomarker analysis of hemoglobin adducts of acrylamide and glycidamide enantiomers for mid-term internal exposure assessment by isotope dilution ultra-high-performance liquid chromatography tandem mass spectrometry. (cdc.gov)
Inductively Coupled Plas1
Time-of-Flight Ma2
Rapid Communicatio1
Characterization5
  • Electrospray ionization-ion trap mass spectrometry effectively reveals the structural characterization of complex N-linked glycoprotein oligosaccharides, enabling detailed analysis of their linkages and structures. (consensus.app)
  • Electrospray ionization-ion trap mass spectrometry, with its capacity to perform multiple stages of fragmentation (MSn), is demonstrated as an effective method for the structural characterization of permethylated N-linked complex glycoprotein oligosaccharides. (consensus.app)
  • Mass spectrometer that is designed for automated protein identification and characterization, biomarker detection, oligonucleotide quality control, and SNP genotyping. (coremarketplace.org)
  • We also present a novel method for characterization of the materials using liquid chromatography mass spectrometry to quantify the analytes of interest. (cdc.gov)
  • We develop and optimize analytical methods for organic and organometallic compounds, using either liquid chromatography (UHPLC) or supercritical fluid chromatography (SFC) with MS and MS/MS characterization or quantification. (lu.se)
Metabolomics3
  • Alongside, his excellent academic achievements during his undergraduate years, he has been currently engaged in various Research such as Metabolomics, Mass spectrometry as well as Natural products. (chemistnotes.com)
  • Assessment of sampling strategies for gas chromatography-mass spectrometry (GC-MS) based metabolomics of cyanobacteria. (mpg.de)
  • The transition from relative to absolute quantification of metabolites is the future development trend of mass spectrometry-based metabolomics research, which could fundamentally solve the problem of comparability of data between different laboratories. (bvsalud.org)
Separation3
  • Among the various separation techniques available at an analytical scale, reverse phase chromatography is the most favored and widely used method. (chemistnotes.com)
  • Z. Zhang, B. Yan, K. Liu, Y. Liao, H. Liu*，Separation and fragmentation study of heroin and its basic impurities by reversed- phase liquid chromatography coupled to tandem mass spectrometry, Rapid Commun. (siaoyin.com)
  • B. Yu, H. Cong, H. Liu*, Y. Li and F. Liu, Separation and detection of erythropoietin (EPO) by CE and CE-MS, Trend in Analytical Chemistry, TrAC, 24(4) (2005) 350-357. (siaoyin.com)
DESI5
  • Nanospray desorption electrospray ionization (nano-DESI) is an ambient pressure ionization technique used in mass spectrometry (MS) for chemical analysis of organic molecules. (wikipedia.org)
  • Unlike desorption electrospray ionization (DESI), from which nano-DESI is derived, nano-DESI makes use of a secondary capillary, which improves the sampling efficiency. (wikipedia.org)
  • The typical nano-DESI probe setup consists of two fused silica capillaries - primary capillary which supplies solvent and maintains a liquid bridge, and secondary capillary which transports the dissolved analyte to the mass spectrometer. (wikipedia.org)
  • Cedric is currently a PhD Candidate at Purdue University Department of Chemistry (R. Graham Cooks, advisor) focused on cancer diagnosis by desorption electrospray ionization (DESI) mass spectrometry imaging. (cornell.edu)
  • Typical setup of a desorption electrospray ionization (DESI) experiment, in which samples are nebulized directly from a surface by a spray of charged droplets. (the-scientist.com)
Quantification1
  • Discovery Proteomics and Absolute Protein Quantification Can Be Performed Simultaneously on an Orbitrap-Based Mass Spectrometer. (ncsu.edu)
Spectrometer12
  • High voltage (several kV) is applied between the inlet of the mass spectrometer and the primary capillary, creating a self-aspirating nanospray. (wikipedia.org)
  • In summary, metabolites from each blood sample were extracted and analyzed by GC/MS (Thermo Fischer, DSQ mass spectrometer) and LC/MS (Thermo Fischer, LTQ mass spectrometers). (hindawi.com)
  • The analyte ions of interest were guided into an ion trap mass spectrometer for tandem mass analysis. (elsevierpure.com)
  • It involves the use of a high-energy spray of charged solvent droplets that desorb and ionize molecules from the sample, which are then transferred into a mass spectrometer for analysis. (chromatographyonline.com)
  • The detection was performed on a triple quadrupole tandem mass spectrometer by multiple reaction monitoring (MRM) mode via electrospray ionization (ESI) source. (unboundmedicine.com)
  • Single quadrupole mass spectrometer is used for fragment spectra for volatile compounds. (coremarketplace.org)
  • Benchtop Q-Tof mass spectrometer for small molecule accurate mass determination (HRMS), intact protein analysis, and peptide mapping. (coremarketplace.org)
  • MALDI (Matrix Assisted Laser Desorption/Ionization) tandem mass spectrometer specially designed for automated MS and MS/MS high throughput identification of proteins and peptides. (coremarketplace.org)
  • Tandem Mass Spectrometry is a technique that utilizes more than one mass selective stage in a mass spectrometer. (coremarketplace.org)
  • Synapt G2 Mass Spectrometry (MS) system is a hybrid, quadrapole/orthogonal acceleration, time-of-flight (oa-TOF) mass spectrometer controlled by MassLynx software. (coremarketplace.org)
  • The eluate from the column is ionized using electrospray ionization, which is used to generate and transmit ions into the mass spectrometer. (cdc.gov)
  • This sensitive and robust triple quadrupole mass spectrometer is used for analysis of low (ppb) levels of environmental compounds and biomarkers. (lu.se)
Metabolites1
  • This method is a quantitative procedure to measure urinary metabolites of benzene, furfural, and 5-hydroxymethylfurfural using ultra-performance liquid chromatography coupled with electrospray ionization tandem mass spectrometry (UPLC-ESI-MS/MS). Sample preparation involves 1:10 dilution of 50 µL urine samples in ammonium formate buffer, pH 2.9. (cdc.gov)
Atmospheric pressure c1
  • Ionisation modes include electrospray ionization (ESI) or atmospheric pressure chemical ionization (APCI). (lu.se)
Morphology1
  • The transforming mechanism was further explored from physical and chemical aspects based on the analyses of surface morphology and surface chemistry. (flow3d.co.kr)
20212
  • Sigman, M. E. "Classification of ground-truth fire debris samples using artificial neural networks" Forensic Chemistry ( 2021 ) Vol. 23. (ucf.edu)
  • Wood, T. "Validation of ground truth fire debris classification by supervised machine learning", Forensic Chemistry ( 2021 ) Vol. 26. (ucf.edu)
Peptides1
  • This is a powerful analytical equipment used for identification of analyses in complex matrices as well as for quantitative and qualitative analysis of peptides and proteolytic digests. (lu.se)
Purdue University3
  • Cedric received his master's degree in Analytical Chemistry from Purdue University (2002) and his Juris Doctorate from Indiana University School of Law-Indianapolis (2005). (cornell.edu)
  • Scientists at Purdue University, led by Graham Cooks, professor of analytical chemistry, recently reported a novel method for processing samples for mass spectrometry (MS) analysis. (the-scientist.com)
  • Since the serine octamer was first identified, figuring out its structure has been a playground for theory and experiment, says R. Graham Cooks , a mass spectrometrist at Purdue University who first reported the octamer. (acs.org)
20173
  • Sigman, M. E. "Investigative probabilistic inferences of smokeless powder manufacturers utilizing a Bayesian network", Forensic Chemistry (2017) Vol. 3, p41-51. (ucf.edu)
  • Sigman, M. E. "Major chemical compounds in the Ignitable Liquids Reference Collection and Substrate databases", Forensic Chemistry ( 2017 ) Vol. 5, p91-108. (ucf.edu)
  • Sigman, M. E. "Biodegradation of representative ignitable liquid components on soil", Forensic Chemistry ( 2017 ) Vol. 6, p19-27. (ucf.edu)
Analysis20
  • Therefore, we implemented a new analytical approach to first map hydrolysate data sets by performing non-targeted LC-MS analysis followed by non-targeted and targeted data analysis. (springer.com)
  • The analysis of protein hydrolysates using ultra-performance liquid chromatography-mass spectrometry (UPLC-MS) can be complex. (springer.com)
  • Sigman, M. E. "Application of likelihood ratios and optimal decision thresholds in fire debris analysis based on a partial least squares discriminant analysis (PLS-DA) model", Forensic Chemistry ( 2019 ) Vol. 16. (ucf.edu)
  • Sigman, M. E. "Model-effects on likelihood ratios for fire debris analysis", Forensic Chemistry ( 2018 ) Vol. 7, p38-46. (ucf.edu)
  • Gas chromatography/mass spectrometry, liquid chromatography/tandem mass spectrometry, clinical chemistry analysis, dual-energy X-ray absorptiometry, and 16S pyrosequencing were used to characterize blood metabolic, clinical, and fecal microbiome systems, respectively. (hindawi.com)
  • Cedric thesis research is using multivariate statistical analysis of mass spectra to statistically differentiate cancer and non-cancerous tissue in dog bladder cancer (urothetial cell carcinoma, aka transitional cell carcinoma "TCC") and human oral squamous cell carcinoma. (cornell.edu)
  • Electrospray ionization-ion trap mass spectrometry for structural analysis of complex N-linked glycoprotein oligosaccharides. (consensus.app)
  • Higher-order experiments further illustrate the potential of electrospray ionization-quadrupole ion trap mass spectrometry for carbohydrate analysis, as MS8 is used to produce significant and otherwise unobtainable branching information for an oligosaccharide from chicken ovalbumin. (consensus.app)
  • These studies constitute further evidence of the unique role that ion trap mass spectrometry can assume in the area of oligosaccharide analysis. (consensus.app)
  • A novel sensitive method utilizing nano extractive electrospray ionization mass spectrometry (nanoEESI-MS) has been developed for the rapid analysis of aerosol drug samples with quantitative information. (elsevierpure.com)
  • Our data demonstrate that nanoEESI tandem mass spectrometry is a fast and sensitive technique for the analysis of aerosol drug preparations, showing promising applications in pharmacology studies and in situ analysis of aerosol drugs on the market. (elsevierpure.com)
  • and the development of current mass spectrometry analysis (MS), which allowed the ionization of molecules, sequential analysis and ion-molecule reaction. (fapesp.br)
  • Combines quadrupole, ion trap, and Orbitrap mass analysis into Tribrid architecture to provide depth of analysis. (coremarketplace.org)
  • The chromatographic analysis consists of a reversed-phase gradient system, which uses electrospray ionization in negative-ion mode with a triple-quadrupole mass spectrometric detector. (cdc.gov)
  • In Paper III, adendrimer-based calibration solution for electrospray ionization (ESI)-MSwas developed, intended for peptide analysis. (kth.se)
  • Compared with published protocols based on gas chromatography-mass spectrometry and liquid chromatography coupled to electrospray ionization mass spectrometry, this method does not require derivatization and does not show matrix effects, thus simplifying sample preparation procedure and reducing the total time of analysis to approximately 90 min. (unimib.it)
  • Official methods of analysis of the Association of Official Analytical Chemists. (cdc.gov)
  • Official methods of analysis of the Association of Official Analytical Chemists, 289-290. (cdc.gov)
  • Four PARP inhibitors were separated on a Hypersil GOLD™ aQ C18 Polar Endcapped LC column (50 × 2.1 mm, 1.9 µm) at 35 â and subjected to mass analysis using positive electro-spray ionization (ESI). (bvsalud.org)
  • Gas chromatography mass spectrometry is also available for the analysis of volatile compounds, as well as a state-of-the-art pipetting robot for automated sample preparation. (lu.se)
Derivatization1
  • The common derivatization method of primary amino groups by 2,4,6-trinitrobenzene sulfonate (TNBS) was applied to the detection of free adducts of advanced glycation end-products (AGEs), in combination with liquid chromatography-tandem mass spectrometry-multiple reaction monitoring (LC-MS/MS-MRM). (elsevierpure.com)
Biochemistry1
Capillary electrophoresis1
  • We specialize in analytical chemistry, especially in capillary electrophoresis, mass spectrometry, and low-cost microfluidics. (upol.cz)
Methods2
  • Comparison of rapid liquid chromatography-electrospray ionization-tandem mass spectrometry methods for determination of glycoalkaloids in transgenic field-grown potatoes. (mpg.de)
  • We describe a novel method to measure petroleum distillates in BAL fluid using gas chromatography-mass spectrometry (GC/MS). METHODS: n-Hexane, n-heptane, n-octane, methylcyclopentane, and cyclohexane were measured in BAL fluid specimens by headspace solid-phase microextraction/gas chromatography/mass spectrometry. (cdc.gov)
20231
  • Forensic Chemistry (2023) Vol. 35. (ucf.edu)
Imaging6
Matrix-assisted l1
  • To get the best results from an instrument, the user musthave knowledge of its limitation and requirements.The sensitivity of matrix assisted laser desorption/ionization (MALDI)-MSis dependent on the surface concentration of the sample. (kth.se)
20181
Compounds2
  • Tandem mass spectrometry was used to confirm the identification of important compounds in each aerosol drug sample. (elsevierpure.com)
  • Routine work includes determination of molecular formula and accurate mass with an accuracy of ± 1 mDa of compounds with m/z up to 3000 mDa. (lu.se)
Structural3
  • A provides a quantitative understanding of the structural and energy variations of the ions formed during the possible ionization of the sample, and also the possible pathways of dissociation of ions formed by collision-induced dissociation (CID), thus the indicative of intermediates and transition states. (fapesp.br)
  • Predicting the structural basis of targeted protein degradation by integrating molecular dynamics simulations with structural mass spectrometry Nature Communications, 13(), 5884. (coremarketplace.org)
  • The number of possible arrangements of the eight serines in the cluster has always challenged the best computer models, and the few structural clues gathered from mass spectrometry and room temperature infrared spectroscopy were not enough to narrow the search. (acs.org)
Aerosol1
  • Without any sample pretreatment, aerosol drugs were manually sprayed into the primary ion plume created by a nano electrospray emitter for direct ionization under ambient conditions. (elsevierpure.com)
Method7
  • A fast and sensitive ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method was developed for the determination and pharmacokinetic study of nimodipine in human plasma. (unboundmedicine.com)
  • The method is based on liquid-liquid extraction followed by reversed phase liquid chromatography coupled to direct-electron ionization mass spectrometry (LC-Direct-EI-MS). The assay is validated. (unimib.it)
  • A modified QuEChERS purification-liquid chromatography-tandem mass spectrometry method has been developed to determine 51 pesticide residues with newly established maximum residue limits (MRLs) in foodstuffs. (bvsalud.org)
  • A sensitive analytical method was developed and validated to simultaneously determine 26 mycotoxins, including regulated and emerging, using stable-isotope-dilution-assay and LC-MS/MS. The study found co-contamination in 100% of samples from Southeast China, with 8-15 different mycotoxins for each and a total of 20 for all. (bvsalud.org)
  • Overall, this study appears to be the first to develop a rapid and robust analytical method of 26 mycotoxins and to conduct Monte Carlo simulation-based chronic risk assessments for 12 individual mycotoxins detected in coix seed, which would be of significance for risk communication as well as for regulatory authority in devising effective strategies to minimize exposure health risk. (bvsalud.org)
  • In this study, we established and validated a liquid chromatography-tandem mass spectrometry (LC-MS/MS) based method to simultaneously quantify the four frequently prescripted PARP inhibitors, namely niraparib, olaparibï¼ fluzoparib, and pamiparib, in ovarian cancer. (bvsalud.org)
  • HiPCOTM) process are difficult to aerosolize, in the reported the generation of SWCNT particles using nanometer size range, directly from the powder phase electrospray method. (cdc.gov)
Determination2
  • Using ion trap mass spectrometry, removal of these substituents permits determination of branching patterns and intersaccharide linkages by MS3 and MS4. (consensus.app)
  • Its capacity for semi-quantitative determination and localization of EDTA under ambient conditions and with very little sample preparation, minimizing sample manipulations and solvent volumes, two important conditions for the development of new methodologies in the field of analytical chemistry, has been shown. (hal.science)
Protein1
  • 2011. Sequence-Specific Capture of Protein-DNA Complexes for Mass Spectrometric Protein Identification . (wisc.edu)
19991
  • Cedric received his bachelor's degree in Chemistry from Tufts University (1999). (cornell.edu)
Assay1
  • We created and characterized BAL fluid pools from non-EVALI individuals to determine assay accuracy, precision, linearity, limits of detection, and analytical specificity. (cdc.gov)
Scientists1
  • We are a service facility equipped with unique technology and experienced scientists in the field of mass spectrometry. (lu.se)
20011
  • In 2001, researchers noticed that serine-unlike other amino acids-formed a charged, eight-membered cluster during electrospray ionization mass spectrometry . (acs.org)
Workflow1
  • It was shown that the insight gained by following such a top down (data) analytical workflow could be crucial for defining a suitable targeted setup and considering data trends beyond the defined targets. (springer.com)
Ions1
  • It was shown that clusters andsome adduct ions would be unsuitable for calibration of ion traps, and thatlinear ion traps showed mass shifts similar to spherical ion traps. (kth.se)
Department of Chemis1
  • The Department of Chemistry offers a range of general doctoral courses. (lu.se)
Synthesis1
  • Maynard 2005, 2006 ), material synthesis (Nakaso that electrospray from a suspension of higher nanotube et al. (cdc.gov)
Combination4
  • The combination between these events has become a useful tool for the growth of many areas of modern chemistry, which further contributes to the understanding of phenomena, per hour, unknown. (fapesp.br)
  • The computational chemistry in combination with mass spectrometry allows comprises several chemical events which may occur during the ionization and dissociation of a particular compound, through appropriated descriptors, for instance, gas-phase basicity, proton affinities, electron affinities and proton transfers. (fapesp.br)
  • High-Resolution Direct Infusion-Based Mass Spectrometry in Combination with Whole C-13 Metabolome Isotope Labeling Allows Unambiguous Assignment of Chemical Sum Formulas. (mpg.de)
  • Researchers used a combination of computer modeling and advanced infrared spectrometry to confirm this molecular arrangement. (acs.org)
Detection2
  • 1000 for methylglyoxal-derived hydroimidazolone) with a detection limit of 1.0 nM (10 fmol/injection volume), which was due to the high ionization efficiency of the derived trinitrophenol moiety and its hydrophobicity. (elsevierpure.com)
  • 1 More than just a technological tweaking, it's an elegantly simple innovation that, MS experts say, could make mass spectrometers invaluable tools for applications ranging from field-site forensics to drug design to bomb detection. (the-scientist.com)
Environmental Chemistry1
  • . Environmental Chemistry, vol. 15: 8, ss. (miun.se)
Journal6
  • Journal of the American Society for Mass Spectrometry. (wisc.edu)
  • Journal of Biological Chemistry. (wisc.edu)
  • Journal of Physical Chemistry. (wisc.edu)
  • Journal of Physical Chemistry C. 114:12635-12641. (wisc.edu)
  • Journal of Agricultural and Food Chemistry, 53(6), 2192-2201. (edu.iq)
  • Chemistry: A European Journal , 23 (8), 1881-1890. (univie.ac.at)
Spectra1
  • Sequential window acquisition of all theoretical fragment ion spectra (SWATH) is a label-free mass spectrometry quantitative technique, which can retain complete fragment ion data and has good accuracy as well as reproducibility. (ncl.edu.tw)
Lund University1
  • The course consists of the following: -the environmental work at Chemistry Center and Lund University -hazards concerning chemicals -protection gear -safety regulations -laws and regulations for environmental safety -hazard evaluations -accidents. (lu.se)