电感耦合等离子体发射光谱法同时测定土壤中8种金属元素

Simultaneous determination of 8 metal elements in soil by ICP–OES

建立电感耦合等离子体发射光谱仪同时测定土壤中K,Na,Ca,Mg,Cu,Pb,Zn,Ba8种元素的分析方法。选取了8种元素干扰较少的分析谱线进行分析,8种元素的质量浓度在各自范围内与特征强度具有良好的线性关系,线性相关系数均不小于0.999,K,Na,Ca,Mg的检出限为0.0033%-0.043%,Cu,Pb,Zn,Ba的检出限为0.13-0.82μg/g。精密度和准确度均能满足多目标区域地球化学调查DZ/T0258–2014的要求,样品的加标回收率为94.2%-105%。该方法操作简便,结果准确、可靠,适合大批量多元素样品的检测,具有推广价值。

A method for simultaneous determination of K, Na, Ca, Mg, Cu, Pb, Zn and Ba in soil by ICP–OES was established. Eight analytical lines with less interference were selected for analysis. The mass concentration of the eight elements had good linear relationships with the characteristic strength in their respective ranges. The linear correlation coefficients were not less than 0.999. The detection limits of K, Na, Ca and Mg were 0.003 3%–0.043%, and the detection limits of Cu, Pb, Zn and Ba were 0.13–0.82 μg/g. The precision and accuracy could meet the requirements of multiobjective regional geochemical survey DZ/T 0258–2014. The recoveries of the samples were 94.2%–105%. The method is simple, accurate and reliable. It is suitable for the detection of multielement samples in large quantities and has the value of popularization.