Abstract：The sample was fused with sodium carbonate-boric acid mixed flux at 950 ℃ for 6-8 min followed by leaching with hydrochloric acid (1+4). The content of SiO2, CaO, Fe2O3 and Al2O3 in vermiculite was simultaneously determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) using Si 288.158 nm, Ca 315.887 nm, Fe 238.204 nm and Al 308.215 nm as analytical lines. The mass fraction of each component in certain range showed linearity to emission intensity. The linear correlation coefficients of calibration curves were higher than 0.999 5. The proposed method was applied to the determination of SiO2, CaO, Fe2O3 and Al2O3 in certified reference materials and actual samples of basalt. The relative standard deviations (RSD, n=6) were between 0.61% and 1.8%. The found results of each component were consistent with the certified values or those obtained by other chemical methods.
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