Abstract: In order to accurately determine the element content in petcoke, the programmed temperature method in microwave muff furnace was used to ash the petcoke samples, followed by lithium tetraborate fusion treatment at 900 ℃ to prepare molten glass, and then dissolved in hydrochloric acid at low temperature to obtain the sample solutions to be tested. The element content of Al, Ca, Na, Fe, Mn, Ni, V and Si in the sample solutions were determined by the optimum characteristic spectral lines for each element using ICP-AES and matrix matching method. The standard recovery rate was between 95% and 105%, and the relative standard deviation (RSD, n = 6) of each element was less than 5%. The matrix matching method shows lower RSD and higher standard recovery rate than without matrix matching method.

Key words: ICP-AES, microwave alkali fusion, matrix matching, petcoke