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通过对5种国家土壤成分分析标准物质的测定,探索用电热消解技术对土壤样品中50多种金属元素进行快速全消解的可能性。样品在选定条件下用硝酸-氢氟酸-高氯酸全消解,使用ICP-MS和ICP-OES测定这些元素。回收率在80%～120%,相对标准偏差小于10%。结果表明,该方法适用于土壤样品的大批量监测,能有效地节省操作成本,降低劳动强度,缩短运行时间。
Through the determination of five national standard of soil component analysis, the possibility of rapid total digestion of more than 50 kinds of metal elements in soil samples by electrothermal digestion technology was explored. Samples were completely digested with nitric acid-hydrofluoric acid-perchloric acid under selected conditions and these elements were determined using ICP-MS and ICP-OES. The recovery rate was 80% ~ 120%, the relative standard deviation was less than 10%. The results show that this method is suitable for large-scale monitoring of soil samples, which can effectively reduce operating costs, reduce labor intensity and shorten operation time.