摘要
对于白云岩中钙镁的测试,经典方法,我们一般运用EDTA滴定法,但是,此法分析手续繁杂,分析时间长,再者,溶液常常受到铁铝等元素的干扰,往往容易使镁的结果偏高;此外,由于溶液PH值的影响,滴定终点往往不容易判断。在功率为1300kw,等离子体冷却气流量15L/min,辅助气流量为0.75L/min,雾化器流量为0.75L/min的实验条件下,以Ca317.933nm,Mg285.213nm作为分析谱线,用四酸分解样品,用ICP-OES测试,省时省力,测得的数据准确度高,测试效果良好。
For the determination of calcium and magnesium in dolomite,we usually use EDTA titration method,but this method is complicated and time-consuming.Moreover,the solution is often interfered by elements such as iron and aluminum,which tends to make the results of magnesium on the high side;in addition,because of the influence of solution PH value,the titration end point is often not.Easy to judge.Under the experimental conditions of 1300kW power,15L/min plasma cooling gas flow,0.75L/min auxiliary gas flow,0.75L/min atomizer flow,Ca317.933 nm,Mg285.213 nm were used as analytical lines,the samples were decomposed by tetracarboxylic acid and tested by ICP-OES,which saved time and labor,and the measured data had high accuracy and good testing results.
作者
刘静
LIU Jing(Gansu fourth Bureau of Geology and mineral resources exploration and development,Jiuquan 735000,China)
出处
《世界有色金属》
2018年第18期242-243,共2页
World Nonferrous Metals
关键词
ICP-AES
白云岩
钙镁元素
实验
ICP-AES
dolomite
calcium and magnesium elements
experiment
