The contents of nitrogen and hydrogen in anthracite were simultaneously,rapidly and accurately determined by the inert gas melting-infrared absorption/thermal conductivity method.A series of experiments were studied.The results indicated that the most complete and reasonable release of nitrogen and hydrogen was achieved when the sample was 0.030 0 g,the analysis power was 5 500 W,the integration delay time of nitrogen was 15 s,the integration time of nitrogen was 55 s,the integration delay time of hydrogen was 5 s,the integration time of hydrogen was 85 s,and the graphite sleeve crucible was used.The correlation coefficients of calibration curves of nitrogen and hydrogen were 0.994 9 and 0.994 0,respectively.The limits of detection were 0.321％and 0.189％,the limits of quantification were 0.326％and 0.194％,and the precision were 3.60％and 0.63％,respectively,which met the requirements of linearity and method.The inert gas melting-infrared absorption/thermal conductivity method is reproducible,efficient and convenient,easy to operate and maintain,and can be used for the quantitative determination of nitrogen and hydrogen in anthracite.
inert gas meltinginfrared absorption/thermal conductivity methodanthracitenitrogenhydrogen
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