Determination of Selenium and Tellurium in Coal by Graphite Furnace Atomic Absorption Spectrometry after Coprecipitation with Arsenic
1987 年 3 巻 1 号 p. 49-52
詳細
1987 年 3 巻 1 号 p. 49-52
A method was developed for the determination of Se and Te in coal and coal ash with graphite furnace atomic absorption spectrometry(AAS). Se and Te were separated from sample solutions by coprecipitation with As(III) carrier. Since absorbances of Se and Te in AAS measurements were affected by As concentration, it was kept constant in the final sample solution. Results of Se in the reference materials, NBS SRM 1632a and NBS SRM 1633a, agreed with their certified values. Coefficients of variation for NBS SRM 1632a were 12% for Se and 24% for Te. The concentrations of Se in 6 sorts of coal, obtained by the newly developed method, ranged from 0.20 to 1.38ppm, with an average of 0.51ppm, and those of Te ranged from 0.037 to 0.075ppm, with an average of
0.058ppm.
