The sample is diluted with kerosene using a 1:1 weight ratio. The resulting solution is directly injected into the plasma of the ICP OES spectrometer (Figure 1), and the content of Na, K, Ca and Mg is calculated with reference to a set of calibration solutions prepared. The wavelengths for the analysis of Na, K, Ca and Mg are 588.995 nm, 422.673 nm and 279.553 nm, respectively.

Main Research: Yung Chee Liang