CAJ | 학술논문

应用石墨炉原子吸收光谱法测定磷矿石中微量铅和铬,优化了仪器工作参数及石墨炉升温程序,探讨了不同酸溶体系、基体改进剂及共存元素的影响.方法检出限为铅0.25 μg/g,铬0.29 μg/g;测定结果的相对标准偏差(RSD,n=12)在2.2%～7.0%;加标回收率为93.2%～107.7%.方法灵敏度高,干扰少,操作简便,应用于磷矿石中微量铅、铬的测定获得了满意的结果.
응용석묵로원자흡수광보법측정린광석중미량연화락,우화료의기공작삼수급석묵로승온정서,탐토료불동산용체계、기체개진제급공존원소적영향.방법검출한위연0.25 μg/g,락0.29 μg/g;측정결과적상대표준편차(RSD,n=12)재2.2%～7.0%;가표회수솔위93.2%～107.7%.방법령민도고,간우소,조작간편,응용우린광석중미량연、락적측정획득료만의적결과.
A method was established to determine the micro-amount of lead and chromium in phosphate ores by graphite furnace atomic absorption spectrometry. The instrument operating parameters and the furnace program were optimized. Some factors which affect the determination results, such as acid digestion system, matrix modifier and interference from concomitant elements were discussed. The detection limits of the method were 0.25 μg/g for lead and 0.29 μg/g for chromium. The recovery of the method was 93.2%～107.7% with precision of 2.2%～7.0%RSD(n=12). The method has been applied to the determination of micro-amount of lead and chromium in phosphate ores with satisfactory results.