过氯乙烯滤膜采样测定空气和废气中铀的分析方法研究

Abstract

Abstract: In this paper, the optimum and most appropriate microwave digestion system was established for the analysis of uranium in air and waste gas samples collected with polyvinyl chloride filter membrane, using a microwave digestion-ICP-MS method. Results showed that, when nitric acid was used as the optimized digestion acid, the uranium standard addition recovery rate was 98.4% to 102.0%, the detection limit was 2×10^-3 ng/m³ (10 m³ of sample volume, 50 mL of constant volume) and radioactivity concentration of uranium detection limit was 6×10^-8 Bq/m³ (based on natural uranium). The uranium content in atmosphere samples was analyzed using the established method and its relative standard deviation (RSD) was 3.18%. Rapid pre-treatment and reliable data were implemented by this method which meets the requirements of fast, stable, efficient and accurate in analysis of the concentration of uranium in air and waste gas samples.

Key words: polyvinyl chloride filter membrane, uranium, microwave digestion, ICP-MS

CLC Number:

O657.4

ZHANG Xiaoyan, ZHANG Guifen, HAO Yue, KONG Huai, CAO Kunwu. Research on analysis methods of uranium in air and waste gas samples collected with polyvinyl chloride filter membrane[J].RADIATION PROTECTION, 2021, 41(5): 410-414.

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Research on analysis methods of uranium in air and waste gas samples collected with polyvinyl chloride filter membrane

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