Determination of tungsten, tantalum, hafnium and rhenium in nickel-based single crystal high temperature alloy by inductively coupled plasma atomic emission spectrometry
ZHU Tian-yi, FENG Dian-ying*, LI Ben-tao, HUANG Hui, LI Ying, GONG Chen
Abstract：The high content refractory elements such as tungsten, tantalum, hafnium and rhenium in nickel-based single crystal high temperature alloy not only hinder the sample pretreatment, but also seriously influence the measurement results due to the spectral interference among elements. The sample was dissolved with 18mL of HCl, 2mL of HNO3 and 2mL of HF. The addition of tartaric acid could stabilize the sample solution for long time. The spectral interference of tungsten, tantalum, hafnium and rhenium in single crystal high temperature alloy was investigated. W 207.911nm, Ta 240.063nm, Hf 282.022nm and Re 197.312nm were selected as analytical lines. The standard solution series were prepared by matrix matching method to draw the calibration curve. The contents of tungsten, tantalum, hafnium and rhenium in nickel-based single crystal high temperature alloy were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). The linearity of calibration curves in linear range was good for all elements, and the correlation coefficients were higher than 0.9997. The limit of detection was in range of 0.0001%-0.0008%. The contents of tungsten, tantalum, hafnium and rhenium in DD6 single crystal high temperature alloy sample were determined according to the experimental method. The relative standard deviation (RSD, n=11) of determination results were between 1.0% and 25%. The recoveries were between 96% and 102%
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ZHU Tian-yi, FENG Dian-ying, LI Ben-tao, HUANG Hui, LI Ying, GONG Chen. Determination of tungsten, tantalum, hafnium and rhenium in nickel-based single crystal high temperature alloy by inductively coupled plasma atomic emission spectrometry. , 2020, 40(4): 29-35.
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