平台石墨炉原子吸收法测定高温镍基合金中痕量碲

DETERMINATION OF TRACE AMOUNT OF TELLURIUM IN HIGH TEMPERATURE NICKEL-BASE ALLOYS BY PLATFORM GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY

用镍作基体改进剂，碲的灵敏度提高约２倍，灰化温度提高４００℃，抗干扰能力明显增强，不需要分离样品基体，采用平台石墨炉即可测定高温镍基合金中痕量碲。方法检出限为０．０４１μｇ／ｇ，样品中碗含量为０．５μｇ／ｇ时，相对标准偏差为３～６％，回收率在９０～９９％之间，方法简单快速。

A method is described for the determination of trace amount of tellurium in high temperature nickel-base alloys by platform graphite furnace. In this work, with nickel as a matrix modifier the sensitivity is enhanced, the ashing temperature is increased and the interferences are reduced. The detection limit of the method is 0. 041 μg/g. The relative standard deviation is 3-6%. The recovery rates are 90-99%. The results are satisfactory.