用巯酰胺分离石墨炉原子吸收法测定高温合金中杂质铋

Determination of Trace Amounts of Bismuth in Superalloys by Graphite Furnace Atomic Absorption Spectrometry with Thionalid Separation

本文叙述了用硫酸胺为沉淀剂以分离基体。降低了试剂的空白值,提高了测定的精密度和准确度。回收率在82～106％。对于0.000028％铋含量的测定,相对标准偏差为14.3％。该方法已成功地应用于测定高温合金中痕量铋。

This paper describes that thionalid is used as the precipitate to separate the matrix with the result of decrease of the blank of the agents and increase of the precision and accuracy of the determination. The recovery rate of bismuth is 82-106% And the relative standard deviation is 14.3% for 0.000028% bismuth content. The method has been applied successfully to the determination of trace amounts of bismuth in superalloys already.