摘要
Abstract
The phosphate ore samples were fused by grainy NaOH in a silver crucible at 700℃ , and then dissolved with HC1 acid solution. A method for the determination of Si, P, S, Ca, Mg, Al, Fe, Ti and Mn in phosphate ores by Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES) was then established. The interferences were eliminated by using matched matrix and off peak background correction. The sample digestion conditions and reagent usage were optimized. The selection of analysis spectral lines, the effects and elimination of interferences and instrument parameters are presented in this paper. This method provides the advantages of high recoveries of 97.92% - 107. 1% with relative standard deviations ( RSD, n = 12) of 0. 28% - 1. 85% and is rapid and inexpensive. The presented method has been applied to the analysis of major elements in national standard reference of phosphate ores and the results are in agreement with certified values.关键词
磷矿石/常量元素/氢氧化钠熔融/电感耦合等离子体发射光谱法Key words
phosphate ores/ major elements/ sodiun hydroxide fused/ Inductively Coupled Plasma-Atomic Emission Spectrometry分类
天文与地球科学
