【引用本文】 李妤, 田志仁, 蒋月, 等. 土壤中锌元素测定精密度评价标准建议值的探讨[J]. 岩矿测试, 2021, 40(5): 731-739. doi: 10.15898/j.cnki.11-2131/td.202009090123
LI Yu , TIAN Zhi-ren , JIANG Yue , et al. Research on the Precision Evaluation Standard for Determination of Zn in Soils[J]. Rock and Mineral Analysis, 2021, 40(5): 731-739. doi: 10.15898/j.cnki.11-2131/td.202009090123

土壤中锌元素测定精密度评价标准建议值的探讨

1. 北京科技大学能源与环境工程学院, 北京 100083;

2. 中国环境监测总站, 国家环境保护环境监测质量控制重点实验室, 北京 100012;

3. 重庆市生态环境监测中心, 重庆 401147

收稿日期: 2020-09-09  修回日期: 2021-03-14 

基金项目: 国家重点研发计划项目"场地土壤与地下水污染评估与风险预测方法研究"(2018YFC1800204)

通信作者: 田志仁,硕士,高级工程师,从事土壤与地下水生态环境监测工作。E-mail:1731427795@qq.com。

Research on the Precision Evaluation Standard for Determination of Zn in Soils

1. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;

2. State Environmental Protection Key Laboratory of Quality Control in Environmental Monitoring, China National Environmental Monitoring Centre, Beijing 100012, China;

3. Chongqing Environmental Monitoring Centre, Chongqing 401147, China

Corresponding author: TIAN Zhi-ren , 1731427795@qq.com

Received Date: 2020-09-09
Revised Date: 2021-03-14

摘要:将标准样品和一定数量已知浓度水平的实际样品,在特定的实验室进行比对测试,从而获得某一项目分析测试方法的精密度控制水平,是当前技术规范或标准方法制定过程的常用手段。本文选取来自中国31个省(区、市)的大批量(871个)、不同浓度梯度、不同类型(34种)、具有地域代表性的实际土壤样品,开展了土壤中Zn元素含量测定的精密度控制研究,全部以盲样方式分发至76家不同的实验室,每个样品由2~4家不同实验室进行室内和室间平行比对测试,旨在提出更具有效性、代表性和普适性的精密度控制评价标准建议值。实验中选用当前国家土壤生态环境监测工作中最常用的两种标准方法——火焰原子吸收光谱法(AAS)和波长色散X射线荧光光谱法(XRF)测试土壤中Zn含量。数据分析结果表明,两种不同的测试方法下其精密度控制结果无显著差异;不同土壤类型可能会对精密度控制水平产生影响,主要原因在于不同土壤类型存在基质组成的差异,可能会导致消解程度或压片密实度不同。因此,在实际监测工作中,还需考虑不同类型土壤的分析测试条件需求差异和测试结果的可比性。

关键词: , 土壤, 生态环境监测, 火焰原子吸收光谱法, 波长色散X射线荧光光谱法, 精密度, 相对偏差

Research on the Precision Evaluation Standard for Determination of Zn in Soils

KEY WORDS: zinc, soils, ecological environment monitoring, flame atomic absorption spectrometry, wavelength dispersive X-ray fluorescence spectrometry, precision, relative deviation

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土壤中锌元素测定精密度评价标准建议值的探讨

李妤, 田志仁, 蒋月, 夏新