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[目的]确定原子荧光光度计测砷最佳前处理方法。[方法]用国家标物中心的质控样,采用四种消解法,进行原子荧光光度测砷比较。[结果]湿法消解测定结果3.83mg/kg,干法消解测定结果4.39mg/kg,均落在扇贝质控样(3.7±0.9)mg/kg的范围内,RSD分别为2.0%、3.5%。[结论]要根据样品性质而定,选择湿法消解或干法消解。
[Objective] The research aimed to determine the best pretreatment method for arsenic determination by atomic fluorescence photometer. [Method] With the quality control samples of National Target Center, four kinds of digestion methods were used to compare the atomic fluorescence spectrophotometry arsenic. [Results] The results of wet-digestion were 3.83mg / kg and 4.39mg / kg respectively, all of which were in the range of 3.7 ± 0.9 mg / kg with RSD 2.0%, 3.5% . [Conclusion] According to the nature of the sample, choose wet digestion or dry digestion.