Citation: | SUN Hongbin,YU Tingting,ZANG Huiyuan,et al. Research on Pre-Treatment Technology and Analysis Methods for Main Components in Soluble Potassium Salt[J]. Rock and Mineral Analysis,2024,43(3):449−458. DOI: 10.15898/j.ykcs.202308080132 |
Potassium salt is one of the scarcest mineral resources in China, and it is the main raw material for potassium fertilizer in the three major fertilizers of agriculture. Currently, soluble potassium salt resources are the main ones with development and utilization value. At present, there is no national standard material or standard analysis method for soluble potassium salts. In the experiments, soluble potassium salt samples were dissolved by electric heating plate and ultrasonic oscillation. According to the main components of soluble potassium salts, a method for the determination of K+, Na+, Ca2+ and Mg2+ by ICP-OES and a method for the determination of Cl− and SO4 2− by ion chromatography (IC) in soluble potassium salts were established. Through experimental conditions, the dissolution temperature of the electric heating plate was determined to be 160℃ and slightly boiled for 20min; the ultrasonic oscillation dissolution power was 60Hz and the time was 20min. The precision of the two methods was between 0.55%−3.19% (RSD,