Determination of radium isotopes in mine waters through alpha- and beta-activities measured by liquid scintillation spectrometry

1997 ◽  
Vol 222 (1-2) ◽  
pp. 69-74 ◽  
Author(s):  
Nguyen Dinh Chau ◽  
J. Niewodniczański ◽  
J. Dorda ◽  
A. Ochoński ◽  
E. Chrusciel ◽  
...  
Keyword(s):  
Liquid Scintillation ◽  
Liquid Scintillation Spectrometry ◽  
Mine Waters ◽  
Radium Isotopes

scholarly journals Determination of Radon by Liquid Scintillation α/β Particle Spectrometry: Towards the Resolution of a 14C Dating Problem

Radiocarbon ◽  
1988 ◽  
Vol 30 (1) ◽  
pp. 19-24 ◽  
Author(s):  
Henry Polach ◽  
Lauri Kaihola
Keyword(s):  
Liquid Scintillation ◽  
Liquid Scintillation Spectrometry ◽  
14C Dating ◽  
Particle Emissions ◽  
Radon Decay ◽  
Mathematical Evaluation ◽  
Counting Window ◽  
Age Determinations

Traces of uranium and radium within the 14C sample generate radon (Rn) which gets occluded during the benzene synthesis, thus generating false (extra) counts within the 14C counting window. This, if undetected, gives rise to erroneous 14C age determinations. The application of simultaneous α and β liquid scintillation spectrometry will enable a mathematical evaluation of the 14C signal unaffected by α and β particle emissions from radon decay daughters.

scholarly journals Influence of natural radium contamination of barium chloride on the determination of radium isotopes in the water samples using α/β liquid scintillation spectrometry

Nukleonika ◽  
2016 ◽  
Vol 61 (4) ◽  
pp. 467-471
Author(s):  
Chau Nguyen ◽  
Magdalena Czechowska ◽  
Jakub Nowak ◽  
Paweł Jodłowski
Keyword(s):  
Water Samples ◽  
Liquid Scintillation ◽  
Activity Concentration ◽  
Barium Chloride ◽  
Counting Method ◽  
Optimum Amount ◽  
Radium Isotopes ◽  
Chemical Companies ◽  
Chemical Procedure

Abstract The determination of radium isotopes in drinking water by liquid scintillation technique requires some reagents that are used for separating radium from water samples. One of the main reagents is BaCl2·H2O. This paper presents the study of this compound and shows that barium chloride reagent is naturally contaminated with226Ra. The 226Ra activity concentration in BaCl2·H2O reagent produced by chemical companies from Poland and other countries is equal to a few dozen Bq/kg. Furthermore, 14 mL of 0.10 M BaCl2·H2O solution is the optimum amount which should be used for the chemical procedure. At the optimum amount of barium chloride and 2-hour measurement, the detection limit of 226Ra and 228Ra of the liquid scintillation counting method is equal to 5 and 30 mBq per sample, respectively.

Determination of Naptalam and Its Metabolite in Foods, as 1-Naphthylamine, Using Liquid Chromatography with Oxidative Electrochemical Detection

1987 ◽  
Vol 70 (6) ◽  
pp. 1021-1024
Author(s):  
Brian L Worobey ◽  
Brian J shields
Keyword(s):  
Liquid Chromatography ◽  
Electrochemical Detection ◽  
Liquid Scintillation ◽  
Base Hydrolysis ◽  
Liquid Scintillation Spectrometry ◽  
Applied Potential ◽  
Electrochemical Detector ◽  
Reverse Phase ◽  
Hydrolysis Of

Abstract A new method is described for the determination of the herbicide naptalam and its metabolite l-naphthylamine in several foods. The method is sensitive, selective, and extremely rapid compared with previously reported methods. Liquid chromatography with electrochemical detection (LC/ECD) is used to determine l-naphthylamine produced from the metabolism or base hydrolysis of naptalam in asparagus, peaches, and cranberries. These foods were spiked with naptalam at 0.05 and 0.11 ppm and hydrolyzed with 30% NaOH with concomitant distillation of l-naphthylamine. Aliquots of the distillate were injected onto a reverse-phase PRP-1 LC column for separation of l-naphthylamine from coextractives near the solvent front and detection at an applied potential of +0.83 V using an amperometric electrochemical detector in the oxidation mode. Recoveries ranged from 89% ± 2% to 97% ± 8% for all foods at both spiking levels. Accuracy of these recoveries was confirmed by use of "C-radioIabeled naptalam and radioassay by liquid scintillation spectrometry of the "C-l-naphthylamine released.

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