石墨炉原子吸收法测定水中的痕量钴

Determination of Trace Cobalt in Water by Graphite Furnace Atomic Absorption Spectrometry

考察了石墨炉原子吸收法（ＧＦＡＡＳ）中不同基体改进剂对钴的灰化、原子化温度的影响，采用钯－锶为基体改进剂测定了自来水、井水及河水中的痕量钴，方法的灵敏度和检出限分别为０１５ｐｇ和０２１ｐｇ，回收率为９７８％～１０１３％。

A method has been developed for the determination of cobalt with graphite furnace atomic absorption spectrometry (GFAAS) A higher pyrolysis temperature of 1550℃ and a higher sensitivity were obtained with palladium plus strontium as a mixed chemical modifier The proposed method was successfully applied to the determination of cobalt in tap water, well water and river water with a recovery range of 97 8%～101 3%