Determination of plutonium isotopes ( 238,239,240 Pu) and strontium ( 90 Sr) in seafood using alpha spectrometry and liquid scintillation spectrometry

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.

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Determination of 222Rn in fresh water: Development of a robust method of analysis by α/β separation liquid scintillation spectrometry

Applied Radiation and Isotopes ◽

10.1016/j.apradiso.2006.06.006 ◽

2007 ◽

Vol 65 (1) ◽

pp. 92-103 ◽

Cited By ~ 15

Author(s):

Jacqueline M. Pates ◽

Neil J. Mullinger

Keyword(s):

Fresh Water ◽

Liquid Scintillation ◽

Liquid Scintillation Spectrometry ◽

Robust Method ◽

Water Development

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

Applied Radiation and Isotopes ◽

10.1016/j.apradiso.2006.06.002 ◽

2007 ◽

Vol 65 (2) ◽

pp. 209-217 ◽

Cited By ~ 14

Author(s):

Cordula Nebelung ◽

Lutz Baraniak

Keyword(s):

Simultaneous Determination ◽

Liquid Scintillation ◽

Liquid Scintillation Spectrometry

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Determination of 234U and 238U Activities in Soil by Liquid Scintillation and High-Resolution Alpha Spectrometry

Journal of Nuclear Physics Material Sciences Radiation and Applications ◽

10.15415/jnp.2021.82014 ◽

2021 ◽

Vol 8 (2) ◽

pp. 115-120

Author(s):

Montero-Cabrera María Elena ◽

Caraveo-Castro Carmen del Rocío ◽

Méndez-García Carmen Grisel ◽

Mendieta-Mendoza Aurora ◽

Rentería-Villalobos Marusia ◽

...

Keyword(s):

High Resolution ◽

Alpha Spectrometry ◽

Liquid Scintillation ◽

Activity Concentration ◽

Ion Exchange Resin ◽

Chemical Recovery ◽

Electrode Position ◽

Arid Environments ◽

Order Of Magnitude

Uranium is a radioactive element with a special presence in the rocks, waters, sediments, soils, and plants at the state of Chihuahua. The activity ratio of 238U/234U is used to explain the uranium transport by surface water and its deposition in arid environments. In this work, the activity concentration of natural U isotopes is determined by PERALS liquid scintillation and high-resolution alpha spectrometry (AS, Canberra camera 7401VR) in the Environmental Radiological Surveillance Laboratory (LVRA) at CIMAV, Chihuahua. Uranium is extracted from soils through the scintillating liquid extractor URAEX for PERALS, with chemical recovery (CR) of 80 - 85 %, and through the ion exchange resin UTEVA + electrode position by the Hallstadius method, with CR of 85 - 90 %, for AS. The procedures of 234U and 238U activity concentration (AC) determination in soils were validated by their application to the certified reference material IAEA-375. The resulting values were in the reference range of the certified or informative values. Both procedures were applied to 6 representative soil samples, with AC of the same order of magnitude or greater, and similar CR and compatible results. Both procedures are satisfactory for the purposes of LVRA research and in general.

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

Journal of AOAC INTERNATIONAL ◽

10.1093/jaoac/70.6.1021 ◽

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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