采用微波消解辅助混酸(盐酸-硝酸-氢氟酸-高氯酸),讨论了加入草酸、柠檬酸、酒石酸、EDTA二钠盐等络合剂对土壤样品进行前处理的影响,根据加标回收实验和国家标准物质(GSS-1)验证实验,采用电感耦合等离子体发射光谱法(ICP-OES)同时分析土壤样品中的22种元素。结果表明:加入4 mL 10%的酒石酸络合剂的效果最好,22种元素测定结果的相对标准偏差在0.06%~4.0%范围内;检出限为0.024~0.846μg/mL;回收率良好。该方法可用于土壤样品前处理技术及土壤中元素含量测定。
【英文摘要】
Microwave digestion with mixed acid HNO_3/HF/HClO_4/HCl method was adopted for the determination of soil samples.The effects of addition of oxalic acid,citric acid,tartaric acid and EDTA disodium salt on the pretreatment of soil samples were discussed.The recoveries of standard addition of each element and the certified values of the national soil standard(GSS-1) verified the method.The 22 elements in soil samples were determined by inductively coupled plasma optical emission spectrometry.Results showed tha...
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