Determination of eleven elements in high carbon dedusting ash byinductively coupled plasma atomic emission spectrometry
XIA Hui1,2, WANG Xiao-qiang1,2, HE Sha-bai1,2YAN Hui-yuan1,2, SHI Jie1,2, TIAN Cai-fang1,2
1.General Institute for Nonferrous Metals and Geological Exploration of Henan Province, Zhengzhou 450052, China; 2.Key Laboratory of Deep Ore-prospecting Technology Research for Non-ferrous Metals of Henan Province, Zhengzhou 450052, China
Abstract：The influence of high content carbon on determination of magnesium, aluminum, potassium, calcium, chromium, manganese, copper, barium, lead, cadmium and zinc in high carbon dedusting ash was focused on and discussed. Meanwhile, the problem of carbon removal was also solved. After the carbon in dedusting ash sample was removed by high temperature in muffle furnace, the ashes were dissolved by hydrochloric acid-nitric acid-hydrofluoric acid-perchloric acid. Then, the analytical lines and background deduction mode of magnesium, aluminum, potassium, calcium, chromium, manganese, copper, barium, lead, cadmium and zinc were selected. Consequently, a determination method of magnesium, aluminum, potassium, calcium, chromium, manganese, copper, barium, lead, cadmium and zinc in high carbon dedusting ash was established by inductively coupled plasma atomic emission spectrometry(ICP-AES). Under the optimal working conditions of instrument, the linear correlation coefficients (r) of calibration curves were all higher than 0.999 5. The detection limits of method were in range of 1.08-26.01 mg/kg. The proposed method was applied to the determination of magnesium, aluminum, potassium, calcium, chromium, manganese, copper, barium, lead, cadmium and zinc in high carbon dedusting ash actual sample. The relative standard deviations (RSD, n=11) were between 0.90% and 7.1%. The recoveries were between 90% and 117%. The content of magnesium, aluminum, potassium, calcium and zinc in dedusting ash was determined by the experimental method, and the results were consistent with those obtained by flame atomic absorption spectrometry (FAAS).
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