引用本文:唐爱玲.土壤中有效态砷钒铬的两种提取方法比较[J].环境监控与预警,2019,11(1):21-25
TANG Ai-ling.Comparative Study of Two Methods on Extraction of As, V and Cr in Soil[J].Environmental Monitoring and Forewarning,2019,11(1):21-25
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土壤中有效态砷钒铬的两种提取方法比较
唐爱玲
上海市环境监测中心,上海 200235
摘要:
从提取液对测定结果的影响、消解方法对测定结果的影响和提取效率3个方面,对碳酸氢铵二乙烯三胺五乙酸(AB-DTPA)法和氯化钙-二乙烯三胺五乙酸(CaCl2-DTPA)法提取、电感耦合等离子体发射光谱(ICP-OES)法测定土壤中有效态As、V和Cr的优缺点进行了对比,结果表明:AB-DTPA法比CaCl2-DTPA法提取效率更高。用ICP-OES法测定AB-DTPA法提取有效态As、V和Cr,检出限为0.007~0.019 mg/kg,加标回收率为95.0%~119.0%,相对标准偏差为2.42%~6.30%。该方法快速高效、灵敏度高、准确度和精密度好,实现了多元素同时提取,方法适用性广泛。
关键词:  土壤  有效态        碳酸氢铵-二乙烯三胺五乙酸  氯化钙-二乙烯三胺五乙酸
DOI:
分类号:X833;O658
文献标识码:B
基金项目:
Comparative Study of Two Methods on Extraction of As, V and Cr in Soil
TANG Ai-ling
Shanghai Environmental Monitoring Center,Shanghai 200235,China
Abstract:
Two methods of AB-DTPA and CaCl2- DTPA on extraction of elements As, V and Cr in soil were compared in details in three aspects,including matrix effects,digestion and extraction efficiency.The results showed that,the AB-DTPA extraction method was better than CaCl2-DTPA extraction method.When determined by ICP-OES,the detection limits were 0.007 ~ 0.019 mg/kg.The recovery rates of soil samples were 95.0%~119.0%,and the relative standard deviations were 2.42%~6.30%.This method was quick and efficient with high sensitivity,accuracy and precision.It enables multiple elements to be simultaneously extracted,which expands the scope of its application.
Key words:  Soil  Available form  As  V  Cr  AB-DTPA  CaCl2-DTPA