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本文研究了以KNO_3作基体改进剂,用标准加入法、光控温度石墨炉原子吸收光谱法直接测定了人体血液中痕量锡。方法的相对标准偏差小于6.0%,回收率在95.8～101%之间。
In this paper, KNO_3 as a matrix modifier was used to directly determine trace tin in human blood by standard addition method and light-controlled temperature graphite furnace atomic absorption spectrometry. The relative standard deviation of the method is less than 6.0% and the recovery rate is between 95.8% and 101%.