Simultaneous determination of 226Ra, 233U and 237Np by liquid scintillation spectrometry

2007 ◽  
Vol 65 (2) ◽  
pp. 209-217 ◽  
Author(s):  
Cordula Nebelung ◽  
Lutz Baraniak
Keyword(s):  
Simultaneous Determination ◽  
Liquid Scintillation ◽  
Liquid Scintillation Spectrometry

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.

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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