二乙烯三胺五乙酸提取-原子荧光光谱法测定土壤有效态As的研究  

Determination of soil available As by diethylenetriaminepentaacetic acid extraction-atomic fluorescence spectrometry

作　　者：李秋 贺琼芳 王曦婕 裴若会 LI Qiu;HE Qiongfang;WANG Xijie;PEI Ruohui(Shaanxi Institute of Geology and Mineral Resources Experimental Research Co.,Ltd.,Xi'an 710000,China)

机构地区：[1]陕西省地质矿产实验研究所有限公司,西安710000

出　　处：《黑龙江环境通报》2023年第4期153-155,共3页Heilongjiang Environmental Journal

基　　金：全国土壤污染详查贵州福建等10省质量监控样制备及质量监督检查(121201105000168509)。

摘　　要：本文介绍了用二乙烯三胺五乙酸提取土壤中有效态As的方法,用原子荧光光谱法测定,通过试验研究建立一种准确度好、实用性强的土壤有效态As的分析方法,对GBW07963,GBW07964进行准确度、精密度实验,并对技术指标进行总结。最终确定实验最佳条件,进而对该方法的精密度及准确度进行评价。得出土壤中有效砷检出限为0.02 mg/kg,测定下限为0.08 mg/kg,As检测结果的相对误差RE%在5.00~22.4%之间,能够满足相关技术指标要求。This paper presents a method for extracting available arsenic(As)in soil using diethylenetriaminepentaacetic acid(DTPA)and determining it through atomic fluorescence spectrometry.Through experimental research,an accurate and practical analysis method for soil available arsenic is established.Accuracy and precision experiments are conducted on GBW07963 and GBW07964,and the technical indicators are summarized.Finally,the optimal experimental conditions are determined,and the precision and accuracy of the method are evaluated.The detection limit of available arsenic in soil is determined to be 0.02 mg/kg,and the determination lower limit is 0.08 mg/kg.The relative error(RE%)of arsenic detection results ranges from 5.00%to 22.4%,meeting the requirements of relevant technical indicators.

关 键 词：土壤有效态 DTPA浸提 原子荧光光谱法 

分 类 号：O657.31[理学—分析化学]