AAS法测定出口氟石粉中锰的研究

AAS Method for Determination of Manganese in Fluorspar

基于出口矿产品氟石粉需要测定锰而建立该方法。该方法是将氟石样品经过氢氟酸去除硅,高氯酸冒烟,冷却后再用盐酸、硼酸加热溶解等处理过程,标准溶液中需加入与样品相匹配的钙基体进行测定。锰的线性范围为0.09～2.5μg·mL-1,测量下限为0.001%。用不同含量水平的实际样品所测定的结果与用ISO高碘酸钠光度法测定的结果一致。该方法的特点是准确可靠、简便可行、易于推广。

An AAS method for the determination of manganese in fluorspar was established for the inspection of export product. The fluorspar sample was treated with HF, then fumed with HClO4. After cooling, the residue was dissolved by adding HCl and boric acid with gentle heating. The series of standards for calibration were prepared by adding the same amount of Ca for matrix matching. The linear range of the determination of manganese is 0.09-2.5μg· mL^-1. The determination limit of the method for Mn in fluorspar was 0. 001 0%. Analytical results of real samples with various levels of content by the proposed method were in good agreement with those by the ISO method of speetrophotometry. The method features good precision, easy operation, and convenience for application.