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中国无机分析化学:2022,12(3):12-16
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石墨炉原子吸收测定土壤中的Cd Pb
(1.华北地质勘查局五一四地质大队;2.华北地质勘查局 五一四地质大队)
Determination of Cd, Pb in Soil by Graphite Furnace Atomic Absorption
(1.No.514 Geological Brigade,North China Geological Exploration Bureau,Chengde;2.No.514 Geological Brigade,North China Geological Exploration Bureau,)
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投稿时间:2021-10-29    修订日期:2021-12-02
中文摘要: 摘要:为了提升石墨炉原子吸收测定土壤样品中Cd和Pb的准确度和测试效率,对样品前处理和仪器测试等条件进行优化选择,确定了低温电热板消解样品时,硝酸、氢氟酸、高氯酸的三酸比例和复溶方式以及采用海光GGX-920型石墨炉原子吸收测定Cd和Pb的升温程序、样品和基体改进剂加入量等条件。应用选定方法条件分别对土壤标准物质GBW07403、GBW07449水系沉积物 GBW07309进行6次测定,测定值Cd的相对标准偏差RSD:2.49%~4.67%,相对误差RE:-2.31% ~ 2.22%,测定值Pb的相对标准偏差RSD:1.98%~ 2.54%,相对误差RE:-1.88% ~ 2.11%。此方法精密度和准确度均达到标准要求,是一种准确而快速的检测方法,适合大批量的环境样品检测。
Abstract:Abstract: In order to improve the accuracy and test efficiency of the graphite furnace atomic absorption determination of Cd and Pb in soil samples, the conditions of sample pretreatment and instrument testing were optimized, Determine the ratio of nitric acid, hydrofluoric acid, and perchloric acid when digesting samples with a low-temperature electric heating plate and the method of reconstitution, as well as the heating program, sample and matrix modifier for the determination of Cd and Pb by using Haiguang GGX-920 graphite furnace atomic absorption. Using the selected method conditions, the soil standard material GBW07403 and GBW07449 water system sediment GBW07309 were measured 6 times. The relative standard deviation of the measured value Cd: RSD: 2.49%~4.67%, the relative error RE: -2.31% ~ 2.22%, the measured value The relative standard deviation of Pb RSD: 1.98% ~ 2.54%, the relative error RE: -1.88% ~ 2.11%. The precision and accuracy of this method meet the standard requirements, and it is an accurate and fast detection method suitable for the detection of large quantities of environmental samples.
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基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
引用文本:
许晓慧,张文宇,谷周雷,刘 卫.石墨炉原子吸收测定土壤中的Cd Pb[J].中国无机分析化学,2022,12(3):12-16.
xuxiaohui,ZHANG Wenyu,GU Zhoulei,LIU Wei.Determination of Cd, Pb in Soil by Graphite Furnace Atomic Absorption[J].Chinese Journal of Inorganic Analytical Chemistry,2022,12(3):12-16.

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