职业与健康 ›› 2026, Vol. 42 ›› Issue (6): 757-761.

• 论著 • 上一篇    下一篇

复杂基质水中砷能力验证结果与分析

张文隽1, 崔悦1, 曹冬1, 王旭阳2   

  1. 1 北京市海淀区疾病预防控制中心北京 100094
    2 北京市昌平区疾病预防控制中心北京 102200
  • 收稿日期:2025-06-29 修回日期:2025-07-21 出版日期:2026-03-15 发布日期:2026-04-03
  • 作者简介:张文隽,女,主管技师,主要从事环境卫生、食品卫生相关检测与分析工作。

Proficiency testing results and analysis of arsenic in water with complex matrices

ZHANG Wenjun1, CUI Yue1, CAO Dong1, WANG Xuyang2   

  1. 1 Beijing Haidian District Center for Disease Control and PreventionBeijing 100094, China
    2 Beijing Changping District Center for Disease Control and PreventionBeijing 102200, China
  • Received:2025-06-29 Revised:2025-07-21 Online:2026-03-15 Published:2026-04-03

摘要:

目的 比较不同前处理方法对复杂基质水中砷检测的影响,筛选一种能够确保峰型和出峰时间正常的最优方法,并通过能力验证。 方法 参照GB/T 5750.6—2023《生活饮用水标准检验方法 第6部分:金属和类金属指标》9.1采用氢化物原子荧光法测定水中砷含量,将样品溶液用纯水、5%盐酸和125 g/L的硫脲-抗坏血酸溶液稀释至5倍后,在70 ℃下加热30 min,随后进入原子荧光光度计检测。 结果 在 0~20 μg/L线性范围内,标准曲线为I=90.927 4×C-13.638 7,相关系数为0.999 7,使用加标回收和参考样品对样品进行质量控制,能力验证结果满意。 结论 通过本次能力验证,实验人员优化了复杂基质水样的前处理步骤,提高了砷检测的准确性,为复杂水样中砷的检测提供了一种有效的前处理方法。

关键词: 砷, 原子荧光, 水中基质, 能力验证, 影响因素

Abstract:

Objective To compare the impact of different pre-treatment methods on the detection of arsenic in water with complex matrices,screen for the optimal method that ensures normal peak shape and retention time,and verify this through proficiency testing. Methods Referring to GB/T 5750.6-2023 "standard examination methods for drinking water-Part 6:Metal and metalloid indices" 9.1,hydride generation atomic fluorescence spectrometry was used to determine arsenic in water. The sample solution was diluted to 5 times with pure water,5% hydrochloric acid,and the 125 g/L thiourea-ascorbic acid solution,heated at 70 ℃ for 30 min,and then detected by atomic fluorescence spectrophotometry. Results Within the linear range of 0-20 μg/L,the standard curve was I=90.927 4×C-13.638 7,with a correlation coefficient of 0.999 7. Quality control was performed on the samples using spike recovery and the reference sample,and the proficiency testing result was satisfactory. Conclusion Through this proficiency testing,the laboratory personnel optimize the pre-treatment steps for complex matrix water samples,enhance the accuracy of arsenic detection,and provide an effective pre-treatment method for the detection of arsenic in complex water samples.

Key words: Arsenic, Atomic fluorescence spectrometry, Water matrix, Proficiency testing, Influencing factors

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