土壤中六价铬的测定

摘要

The sample was digested by Na2CO3/NaOH,extracted in alkaline solution,this paper established the method of determining Hexavalent chromium by spectrometer.The results showed that the correlation coefficient of the method is more than 0.999,and the detection limit is 0.092 mg/kg.The method has good repeatability and the relative standard deviation is 4.3％.The recovery rate was between 90.7％ ～ 95.1％.The method is with high precision and accuracy,and is applicable to the determination of hexavalent chromium in soil.%在碱性提取环境中,利用Na2CO3/NaOH溶液消解土壤,建立了土壤六价铬分光光度计测试方法.结果表明:方法相关系数大于0.999,方法检出限0.092 mg/kg,方法重复性较好,测量相对标准偏差4.3％,加标回收率在90.7％ ～95.1％之间.方法具有较高的精密度和准确度,适用于土壤六价铬的测定.