Quantitative analysis of 29 impurity elements in deformed superalloy GH4169 by high resolution glow discharge mass spectrometry
Deformed superalloy GH4169 is widely used in aviation,aerospace and energy fields.The impurity elements in alloy can directly affect its performance,quality and service life.Therefore,the establishment of simultaneous,fast and accurate analytical method for a variety of impurity elements has great significance for the application of GH4169 alloy.In this study,glow discharge mass spectrometry(GDMS)was em-ployed for the quantitative analysis of 29 impurity elements in the deformed superalloy GH4169.By optimi-zing the parameters of GDMS,the influence of discharge parameters in glow ionization on the sensitivity of measured elements was discussed.The experimental conditions were obtained as follows:the discharge voltage was 850 V,the discharge current was 50 mA,and the gas flow was 450 mL/min.The mass spec-trometry interference of measured elements was investigated,and the isotopes with high relative abundance and low interference were selected for testing in different resolution modes(medium/high).The relative sensitivity factors(RSF)of 29 impurity elements were calibrated using matrix-matched certified reference materials or control samples.The quantitatively analysis of 29 impurity elements such as magnesium,phos-phorus,arsenic,and lead in deformed superalloy GH4169 was realized.The GH4169 alloy sample was de-termined according to the experimental method.Meanwhile,the traceable inductively coupled plasma atomic emission spectrometry(ICP-AES),high frequency induction combustion infrared absorption method,hy-dride generation-atomic fluorescence spectrometry(HG-AFS)and inductively coupled plasma mass spec-trometry(ICP-MS)were used for comparison.The accuracy of measurement results was verified by t test.The t-test value of the determination results of 28 impurity elements(except for Cd)was 0.500-2.30＜t0.025,8.There was no significant difference between the GDMS test results and the above analytical results within the 95％confidence interval.The determination result of Cd by GDMS was consistent with that ob-tained by triple quadrupole inductively coupled plasma mass spectrometry(ICP-MS/MS).The relative standard deviations(RSD,n=6)of determination results of 29 impurity elements ranged from 1.0％to 25.7％.
high resolution glow discharge mass spectrometry(GDMS)quantitative analysisdeformed su-peralloy GH4169impurity element
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