流动注射氢化物发生-原子吸收光谱法测定镍基合金中的硒和锡

Determination of Selenium and Tin in Nickel Alloys by Flow Injection Hydride Generation Atomic Absorption Spectrometry

建立了流动注射氢化物发生 -原子吸收光谱法测定高温镍基合金中痕量硒和锡的方法。样品用 HNO3和 HF经微波消解后 ,制成以 EDTA作掩蔽剂的碱性溶液 ( p H 1 2～ 1 3) ,用标准加入法测定。方法测定硒和锡的检出限分别为1 .0μg· g- 1和 1 .8μg· g- 1,RSD分别为 3%～ 8%和 3%～ 7%。

Determination of trace Se and Sn in high temperature nickel alloys by flow injection hydride generation atomic absorption spectrometry was studied. The sample was dissolved by microwave digestion in HNO 3 and HF. After addition of EDTA as the masking agent and adjustment of pH to 12～13, Se and Sn were determined by standard addition method. Some reference materials were analysed and satisfactory results were obtained. The detection limits of the method for Se and Sn are 1.0 μg·g -1 and 1.8 μg·g -1 , respectively, the RSD of determination are 3%～8% for Se and 3%～7% for Sn.