• Using currently available liquid scintillation counters, this test method can measure 59 Ni activity concentrations of 50 mBq·l −1 and 63 Ni activity concentrations of 20 mBq·l −1 with a counting time of 200 min and a sample volume of 1,5 l. (iso.org)
  • The method described in this document, using currently available liquid scintillation counters and suitable technical conditions, has a detection limit as low as 1 Bq∙l −1 , which is lower than the WHO criteria for safe consumption of drinking water (100 Bq·l -1 ). (iso.org)
  • The disintegration rates of 35 S and 45 Ca samples were determined by the modified integral counting method, which extrapolates the integral count rate to the zero detection threshold of a liquid scintillation spectrometer. (elsevierpure.com)
  • abstract = "The disintegration rates of35S and45Ca samples were determined by the modified integral counting method, which extrapolates the integral count rate to the zero detection threshold of a liquid scintillation spectrometer. (elsevierpure.com)
  • A liquid scintillation spectrometer has been applied to the determination of the counting efficiency for the air luminescence produced by standardized 222 Rn and its daughters. (elsevierpure.com)
  • Morita-Murase, Y, Murakami, I & Homma, Y 2001, ' The air luminescence count for the rapid determination of 222 Rn in a liquid scintillation spectrometer ', Chemistry Letters , no. 3, pp. 238-239. (elsevierpure.com)
  • ISO 19361:2017 applies to liquid scintillation counters and requires the preparation of a scintillation source obtained by mixing the test sample and a scintillation cocktail. (iso.org)
  • Liquid scintillation counters use signal pulse shape to discriminate alpha and beta events in samples but require precise optimization to minimize the spillover, or misclassification, of those events. (cdc.gov)
  • This document specifies the determination of nickel-59 and nickel-63 ( 59 Ni and 63 Ni) activity concentration in samples of all types of water using liquid scintillation counting (LSC). (iso.org)
  • It is the laboratory's responsibility to ensure the suitability of this test method for the water samples tested. (iso.org)
  • This document specifies a method by liquid scintillation counting for the determination of tritium activity concentration in samples of marine waters, surface waters, ground waters, rain waters, drinking waters or of tritiated water ([ 3 H]H 2 O) in effluents. (iso.org)
  • This document specifies a method for the measurement of 14 C activity concentration in all types of water samples by liquid scintillation counting (LSC) either directly on the test sample or following a chemical separation. (iso.org)
  • ISO 13162:2011 specifies the conditions for the determination of 14 C activity concentration in samples of environmental water or of 14 C-containing water using liquid scintillation counting. (iso.org)
  • ISO 19361:2017 is applicable to all types of liquid samples having an activity concentration ranging from a few Bq·l−1 to 106 Bq·l−1. (iso.org)
  • For a liquid test sample, it is possible to dilute liquid test samples in order to obtain a solution having an activity compatible with the measuring instrument. (iso.org)
  • For solid samples, the activity of the prepared scintillation source shall be compatible with the measuring instrument. (iso.org)
  • ISO 13160:2012 specifies the test methods and their associated principles for the measurement of the activity of 90 Sr in equilibrium with 90 Y, and 89 Sr, pure beta-emitting radionuclides, in water samples. (iso.org)
  • Development and validation of a biomonitoring method to measure As, Cr, and Ni in human urine samples by ICP-UCT-MS. Jo nes DR, Jarrett JM, Stukes D, Baer A, McMichael M, Wallon K, Xiao G, Jones RL. (cdc.gov)
  • Method type(s) for identification: The samples were counted with a liquid scintillation counter LS-750, according to the programme for 14C. (europa.eu)
  • Samples were analyzed by liquid scintillation counting. (cdc.gov)
  • Current determination methods of 99Tc involve several steps, such as chemical separation from the matrix, purification and source preparation, prior to radiometric (e.g. liquid scintillation counting) or mass spectroscopic (e.g. inductively coupled plasma mass spectroscopy) determination, due to its relatively low concentration in environmental samples, even in contamination scenarios. (lancs.ac.uk)
  • A comparison has been made between accelerator mass spectrometry (AMS) analysis and liquid scintillation counting (LSC) of plasma, urine and faecal samples containing 14C-labelled drugs. (kingston.ac.uk)
  • Samples were measured by liquid scintillation counting using 3 H radio-labeled E2. (ewha.ac.kr)
  • Samples were measured by liquid scintillation counting using 3H radio-labeled E2. (ewha.ac.kr)
  • Current analytical methods for chlorine dioxide and chloroxyanions are only applicable to aqueous samples. (purdue.edu)
  • Liquid scintillation counting (LSC) is a valuable analytical tool for the rapid detection and quantification of gross alpha/beta-emitting radionuclides in urine samples. (cdc.gov)
  • In the case of a radiological or nuclear incident, valuable information could be obtained in a timely manner by using liquid scintillation counting (LSC) technique through fast screening of urine samples from potentially contaminated persons. (cdc.gov)
  • The method is not applicable to the analysis of organically bound 14 C, whose determination requires additional chemical processing (such as chemical oxidation, combustion). (iso.org)
  • The method presented in this document is not intended for the determination of ultra-trace amount of 99 Tc. (iso.org)
  • We use decay measurements (liquid scintillation counting) as well as mass spectrometric methods (accelerator mass spectrometry, AMS). (lu.se)
  • The Accelerator Mass Spectrometry (AMS) technique actually counts single atoms! (lu.se)
  • ISO 13160:2012 provides the test methods to determine the activity concentration of 90 Sr in presence of 89 Sr. (iso.org)
  • The range of application depends on the amount of dissolved material in the water and on the performance characteristics of the measurement equipment (background count rate and detection efficiency). (iso.org)
  • This document specifies a method for the measurement of 99 Tc in all types of waters by liquid scintillation counting (LSC). (iso.org)
  • The measurement range is related to the test method used: nature of test portion, preparation of the scintillator - test portion mixture, measuring assembly as well as to the presence of the co-existing activities due to interfering radionuclides. (iso.org)
  • Among the measurement standards discussed are: the calibration and usage of germanium detectors, scintillation detector systems, scintillation detectors for simple and complex spectra, and counting methods such as beta particle counting, aluminum absorption curve, alpha particle counting, and liquid scintillation counting. (astm.org)
  • 1.1 This test method covers determining the total soluble uranium activity in drinking water in the range of 0.037 Bq/L (1 pCi/L) or greater by selective solvent extraction and high-resolution alpha-liquid-scintillation spectrometry. (astm.org)
  • The gravimetric recovery method requires 120 times more stable Sr than does the inductively coupled plasma mass spectrometry method described here. (cdc.gov)
  • Applications of Emulsions in Tritium Counting. (epa.gov)
  • OTK-01 product series represents the tritium sampler that uses the condensation method, and that does not require an absorption medium. (nutronic.se)
  • ISO 19361:2017describes the conditions for measuring the activity of beta emitter radionuclides by liquid scintillation counting[14][15]. (iso.org)
  • The choice of the test method using liquid scintillation counting involves the consideration of the potential presence of other beta emitter radionuclides in the test sample. (iso.org)
  • In this case, a specific sample treatment by separation or extraction is implemented to isolate the radionuclide of interest in order to avoid any interference with other beta-, alpha- and gamma-emitting radionuclides during the counting phase. (iso.org)
  • These methods cover general procedures for the calibration of radiation detectors and the analysis of radionuclides. (astm.org)
  • 1.1 These methods cover general procedures for the calibration of radiation detectors and the analysis of radionuclides. (astm.org)
  • Rapid detection and quantification of gross alpha/beta-emitting radionuclides by liquid scintillation counting (LSC) is vital in guiding response to a nuclear or radiological incidents. (cdc.gov)
  • As part of the Centers for Disease Control and Preventions post-radiological/nuclear incident response mission, we developed rapid bioassay analytical methods to assess possible human exposure to radionuclides and internal contamination. (cdc.gov)
  • A key characteristic of this type of bioassay method is its detection sensitivity for the priority threat radionuclides. (cdc.gov)
  • A universal method to screen for and quantify individual radionuclides as well as both levels of alpha and beta emitters would address these concerns. (cdc.gov)
  • In the public health response to the incident, valuable information could be obtained in a timely and accurate manner by using liquid scintillation counting techniques to determine who has been contaminated above background for alpha and beta emitting radionuclides. (cdc.gov)
  • These methods are concerned only with specific radionuclide measurements. (astm.org)
  • The detection limit depends on the sample volume, the instrument used, the sample counting time, the background count rate, the detection efficiency and the chemical recovery. (iso.org)
  • Based on the counting efficiency, known amounts of 222 Rn can be prepared in 3.5 h. (elsevierpure.com)
  • The selection of the test method depends on the origin of the contamination, the characteristics of the water to be analysed, the required accuracy of test results and the available resources of the laboratories. (iso.org)
  • The method is applicable to the analysis of any organic molecule soluble in water that is well mixed with the scintillation cocktail. (iso.org)
  • It does not apply to micelles or "large" particles (lipids, fulvic acid, humic acid, etc.) that are inadequately mixed with the scintillation cocktail and the water. (iso.org)
  • Some beta energy is lost without any excitation of the scintillation cocktail and the results are underestimated. (iso.org)
  • All liquid heavy metal waste, must be kept in plastic containers, labelled with the type of solvent you use, the apporoximate concentrations of the heavy metals, pH for watery solutions, and finally labelled with correct CLP pictograms. (lu.se)
  • Their combined citations are counted only for the first article. (google.es)
  • This "Cited by" count includes citations to the following articles in Scholar. (google.es)
  • From the diluted urine and feces, sampels of 1 ml were taken as to evaluate them with scintillation counter in the presence of Instagel, according to the prgramme for 14C. (europa.eu)
  • Evaluate mass balance using liquid scintillation counting. (livecareer.com)
  • Homma, Y, Murase, Y & Handa, K 1994, ' Absolute liquid scintillation counting of 35 S and 45 Ca using a modified integral counting method ', Journal of Radioanalytical and Nuclear Chemistry Letters , vol. 187, no. 5, pp. 367-374. (elsevierpure.com)
  • Different chemical separation methods are presented to produce strontium and yttrium sources, the activity of which is determined using a proportional counter (PC) or liquid scintillation counter (LSC). (iso.org)
  • 5.1 This test method is a fast, cost-effective method that can yield limited isotopic activity levels for 238 U and 234 U, as well as total uranium activity. (astm.org)
  • Current urine radiostrontium separation methods often are based on the use of Sr resin columns or cartridges (Eichrom Technologies). (cdc.gov)
  • This work describes the optimization of LSC parameters on PerkinElmer (PE) Tri-Carb and Quantulus GCT series instruments to develop a rapid method for screening urine in an emergency response situation. (cdc.gov)
  • The test sample can be liquid (aqueous or organic), or solid (particles or filter or planchet). (iso.org)
  • The analysis of Tc adsorbed to suspended matter is not covered by this method. (iso.org)
  • In order to quantify residues in the tissues of a more complex food matrix, while reducing interference from natural organic matter, an analysis method that used radiolabeled chlorine [36Cl] was implemented. (purdue.edu)
  • Then, they were measured in the scintillation counter. (europa.eu)
  • Blood was put to digest decolorise in a mixture of hydrogen peroxide and Packard soluene-isopropanol before being counted in a liquid scintillation counter LS-7500 Beckman in the presence of 10 ml of Instagel-0.5 N HCl, according to the programme for 14C-counting. (europa.eu)
  • Without preconcentration, a method detection limit using the liquid scintillation counter was 0.005 nM (1.36 ng L -1 ), respectively. (ewha.ac.kr)
  • The authors would also like to thank Dr. Miles Orchinik (Department of Biology) for allowing us to use the scintillation counter at Arizona State University. (ewha.ac.kr)
  • 2000. Standard test method for barium in water, atomic absorption spectrophotometry, graphite furnace. (cdc.gov)
  • 1999. Standard test method for barium in brines, seawater, and brackish water by direct-current argon plasma atomic emission spectroscopy. (cdc.gov)
  • 1.2 This test method was tested successfully with reagent water and drinking water. (astm.org)
  • Analyzed sequence data using statistical methods (distance matrix, Adonis/Anosim, simulation, SourceTracker and others) on Qiime and R 3. (livecareer.com)
  • Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. (wikipedia.org)
  • Count rates for extractive scintillator blanks and reagent blanks usually range from 0.01 min -1 to 0.1 min -1 . (astm.org)
  • The method described in this document is applicable in the event of an emergency situation, but not if 99m Tc is present at quantities that could cause interference and not if 99m Tc is used as a recovery tracer. (iso.org)
  • These values can be achieved with a counting time of 30 min for a sample volume varying between 14 ml to 40 ml. (iso.org)
  • The brown cardboard box with liquid scintillation solution classed as chemical waste must be specially labelled, see below. (lu.se)
  • Nonspecific uptake in the presence of selective inhibitors was subtracted from the total counts. (mephedrone.com)
  • In contrast, the conventional method for preparing known amounts of 222 Rn usually requires a long waiting period (ca. 15-30 days). (elsevierpure.com)