石墨炉原子吸收光谱法测定钨粉及三氧化钨中微量铅、镉

Determination of Micro Amount Pb and Cd in Tungsten Powder and Tungsten Oxide by GF-AAS

本文研究了用酒石酸络合基体元素钨 ,在不加基体改进剂的情况下 ,用标准加入法直接测定钨粉及三氧化钨中微量铅、镉的方法。铅、镉的检出限分别为 2 .6ng/ml和 0 .1 1ng/ml,回收率分别在 90 %～ 1 1 5 %和 93 %～ 1 1 3 %之间 ,相对标准偏差均小于1 0 %。

The direct determination of the content of Pb and Cd in tungsten powder and tungsten oxide by GF AAS without adding any matrix modifier had studied in this paper.In this method,tartaricacid complexing wolfram matrix was used .The recovery of Pb is in the range of 90% to 115% and Cd is from 93% to 113%.The detection limit of Pb is 2.6μg/ml and Cd is 0.11ng/ml.The RSD are both not less than 10%.