土壤中有效态砷钒铬的两种提取方法比较
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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(CaCl_2-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CaCl_2-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。
Two methods of AB-DTPA and CaCl_2-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.
Two methods of AB-DTPA and CaCl_2-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.
引文
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[2]代杰瑞,祝德成,王来明,等.土壤重金属元素的形态分布特征及其环境意义[J].地质评论,2015,61:11-12.
[3]甘国娟,刘妍,朱晓龙,等.3种提取剂对不同类型土壤重金属的提取效果[J].中国农学通报,2013,29(2):148-153.
[4]张传琦,程丽娅,黄勤,等.ICP-MS法测定土壤中有效态砷的研究[J].分析试验室,2011,30(7):83-86.
[5]侯明,王香桂.土壤有效态钒的浸提剂和浸提条件研究[J].土壤通报,2010,41(5):1241-1245.
[6]王婷,王静,孙红文,等.天津农田土壤镉和汞污染及有效态提取剂筛选[J].农业环境科学学报,2012,31(1):119-124.
[7]张羽,成杰民.PAN分光光度法测定潮土有效态钒的提取条件筛选[J].贵州农业科学,2014,42(5):137-139.
[8]王晓丽,崔建宇,唐傲寒,等.ICP-AES法测定模拟M3土壤浸出液中养分的最佳条件研究[J].光谱学与光谱分析,2010,30(9):2564-2666.
[9]靳霞,王莉.M3法测定土壤有效态Cd、Cr、Pb和Ni[J].中国环境监测,2013,29(4):116-124.
[10]郝冠军,周建强,方海兰,等.AB-DTPA法测定我国典型土壤多元素有效态含量的适用性分析[J].上海农业学报,2016,32(6):100-107.
[11]孙鸣镝,方海兰,郝冠军,等.AB-DTPA,CaCl2-DTPA两种方法分析土壤8种元素的有效态含量[J].土壤与作物,2014,3(2):50-55.
[12]刘肃,李酉开.Mehlich3通用浸提剂的研究[J].土壤学报,1995,32(2):132-141.
[13]ZHANG M,ZHOU C,HUANG C.Relationship Between Extractable Metals in Acid Soils and Metals Taken Up by Tea Plants[J].Communicatons in Soil Science and Plant Analysis,2004,37(3):347-361.
[14]刘妹,顾铁新,程志中,等.10个土壤有效态成分分析标准物质研制[J].岩矿测试,2011,30(5):536-544.
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