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Brun, S.; Bessac, S.; Uridat, D.; Boursier, B

doi:10.1023/a:1019677120791

Cited by 27 publications

(5 citation statements)

References 18 publications

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“…The chemical yield of the samples processed according to the experimental conditions described above, was determined using 85 Sr as tracer ( Table 1). The mean value obtained (67.4 ± 10.7%; n = 9) is comparable with the value of 62 ± 11% referred in the literature [4]. Other authors [9] consider that a chemical yield of about 60% is acceptable.…”

Section: Validation Trialssupporting

confidence: 86%

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Measurements of Strontium-90 in portuguese milk samples using liquid scintillation counting technique

Lopes

Madruga

2009

Radioprotection

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Abstract. The objective of this study is the implementation of a method combining extraction chromatography and liquid scintillation counting (LSC) technique to the determination of 90 Sr in milk samples. The strontium separation is performed using the commercially available Sr-resin (Eichrom) and the beta counting is carried out using a liquid scintillation detector system (Tri-Carb 3170 TR/SL, Packard). Firstly, the trials are performed with 300 mL of milk and 0.7 g of resin. Validation trials are carried out using spiked milk samples with different 90 Sr activities and the accuracy of the methodology is also been tested with an IAEA 152 reference milk sample. The results obtained had shown good accuracy of expected value. The minimum detectable activity (MDA) obtained for a confidence level of 95% and 60 minutes of sample counting time was 0.20 Bq L −1 . In order to improve the detection limits for 90 Sr, 1 liter of milk and 3 g of resin were used and the MDA value in these conditions was improved to 0.012 Bq L −1 . The method was applied to the determination of the 90 Sr concentrations in milk samples from different regions of Portugal.

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Section: Validation Trialssupporting

confidence: 86%

“…The classical way of 90 Sr determination is based on the greater solubility of calcium nitrate in fuming nitric acid. This method has the disadvantage of handling large amounts of nitric acid for repeated precipitations [4]. Nowadays, this method tends to be replaced by safer and less elaborate procedures.…”

Section: Strontium-90 (mentioning

confidence: 99%

Measurements of Strontium-90 in portuguese milk samples using liquid scintillation counting technique

Lopes

Madruga

2009

Radioprotection

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“…In the past few decades, substantial efforts have been devoted to method development for 90 Sr determination in various samples. Several researchers have made good reviews about the analytical methodologies of 90 Sr, some focusing on the development of radiochemical separation procedures for 90 Sr based on the use of radiometric measurement techniques [29], and some focusing on methods for 90 Sr routine environmental monitoring [1,29] or determination in milk [30]. In the present work, we aim to summarize the analytical methods developed in the past few decades for low-level (e.g., in the range of 1-1000 mBq/L in water or 1-1000 mBq/kg in solid samples) 90 Sr analysis in environmental and biological samples and critically review the pros and cons of different analytical approaches.…”

Section: Introductionmentioning

confidence: 99%

Recent Development on Determination of Low-Level 90Sr in Environmental and Biological Samples: A Review

et al. 2022

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In the context of the rapid development of the world’s nuclear power industry, it is vital to establish reliable and efficient radioanalytical methods to support sound environment and food radioactivity monitoring programs and a cost-effective waste management strategy. As one of the most import fission products generated during human nuclear activities, 90Sr has been widely determined based on different analytical techniques for routine radioactivity monitoring, emergency preparedness and radioactive waste management. Herein, we summarize and critically review analytical methods developed over the last few decades for the determination of 90Sr in environmental and biological samples. Approaches applied in different steps of the analysis including sample preparation, chemical separation and detection are systematically discussed. The recent development of modern materials for 90Sr concentration and advanced instruments for rapid 90Sr measurement are also addressed.

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“…The resin enables a rapid and simple separation for strontium. It's used more and more widely to separate Sr-90 from different matric, such as milk, soil, water and biological sample [16][17][18][19]. However, before passing through the resin a suitable chemical pretreatment is needed to eliminate some interfering nuclides since the resin has saturated adsorption capacity.…”

Section: Introductionmentioning

confidence: 99%

A Rapid Method for Measuring Strontium-90 Activity in Crops in China

Pan

Yu²,

Wen³

et al. 2017

EPJ Web Conf.

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Abstract. A rapid method for measuring Sr-90 activity in crop ashes is presented. Liquid scintillation counting, combined with ion exchange columns 4', 4"(5")-di-t-butylcyclohexane-18-crown-6, is used to determine the activity of Sr-90 in crops. The yields of chemical procedure are quantified using gravimetric analysis. The conventional method that uses ion-exchange resin with HDEHP could not completely remove all the bismuth when comparatively large lead and bismuth exist in the samples. This is overcome by the rapid method. The chemical yield of this method is about 60% and the MDA for Sr-90 is found to be 2.32 Bq/kg. The whole procedure together with using spectrum analysis to determine the activity only takes about one day, which is really a large improvement compared with the conventional method. A modified conventional method is also described here to verify the value of the rapid one. These two methods can meet different needs of daily monitoring and emergency situation.

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Untitled

Cited by 27 publications

References 18 publications

Measurements of Strontium-90 in portuguese milk samples using liquid scintillation counting technique

Measurements of Strontium-90 in portuguese milk samples using liquid scintillation counting technique

Recent Development on Determination of Low-Level 90Sr in Environmental and Biological Samples: A Review

A Rapid Method for Measuring Strontium-90 Activity in Crops in China

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