石墨炉原子吸收法测定土壤中镉的不确定度评定

谢银凤; 王克全; 郝欣欣

引用本文:	谢银凤，王克全，郝欣欣.石墨炉原子吸收法测定土壤中镉的不确定度评定[J].环境监控与预警,2017,9(4):22-25
	XIE Yin feng，WANG Ke quan，HAO Xin xin.Evaluation on Uncertainty of Cadmium in Soil Determined by Graphite Furnace Atomic Absorption[J].Environmental Monitoring and Forewarning,2017,9(4):22-25

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石墨炉原子吸收法测定土壤中镉的不确定度评定
谢银凤，王克全，郝欣欣
潍坊市环境监测中心站，山东潍坊 261041

摘要:

评定了石墨炉原子吸收法测定土壤样品中镉的测量不确定度。在测定过程中，对样品称量、水分测定、样品消解、样品定容、标准溶液配制、标准曲线拟合等影响不确定度的分量进行了评定。按照《测量不确定度评定与-表示》(JJF 1059.1—2012)的规定进行合成，给出了扩展不确定度，镉含量结果的表示式为（0.115±0.015）mg/kg，k=2。

关键词: 石墨炉原子吸收分光光度法镉不确定度土壤

DOI：

分类号:X830.5

文献标识码:B

基金项目:

Evaluation on Uncertainty of Cadmium in Soil Determined by Graphite Furnace Atomic Absorption

XIE Yinfeng，WANG Kequan，HAO Xinxin

Weifang Environmental Monitoring Centre, Weifang, Shandong 261041, China

Abstract:

The uncertainty was estimated for determining cadmium in soil by graphite furnace atomic absorption. Uncertainty components such as sample weighing, moisture determination, process of digestion, volume, preparation of standard solutions, curve fitting were evaluated and synthesized according to Evaluation and Expression of Uncertainty in Measurement (JJF 1059.1—2012). The expanded uncertainty was given. The mathematical expression of analysis of cadmium was given as（0.115±0.015） mg/kg, k=2.

Key words: Graphite furnace atomic absorption Cadmium Uncertainty Soil