石墨炉原子吸收光谱法测定硬聚氯乙烯饮水管中痕量锡

Determination of Trace Tin in Unplastized Polyvinyl Chloride Pipes for Drinking Water Supply by GFAAS

本文按标准 GB/ T10 0 0 2 .1- 1996方法前处理样品 ,硝酸钙作基体改进剂 ,使锡的灰化温度提高并消除干扰。方法简便 ,快速 ,准确 ,灵敏度和精密度高 ,相对标准偏差为 4 .55% ,回收率在 90 %— 10 4 %范围内。

The sample was pretreated in accordance with GB/T 10002.1\|1996.Ca(NO 3) 2 was used as a matrix modifier to increase the ashing temperature of tin and reduce the interference.This method is simple,quick,accurate and sensitive.The RSD is 4.55% and the recovery rate is 90%—104%.