摘要
本文在酸溶解方式上进行改进,可充分分解试样,避免传统消解方法中收残渣至样品损失及碱熔的烦琐过程,最终建立了火焰原子吸收光谱法测定锰矿中杂质元素的方法。该方法缩短了样品消解时间,提高了原子吸收法的分析效率。实验表明:在选定的仪器条件下,铜、铅、锌、镍、钴5种杂质元素校准曲线的相关系数均大于0.9962。方法检出限均在0.019~0.273μg/mL间。利用本方法所得测定值,与电感耦合等离子体原子发射光谱(ICP-AES)法所得测定值几近相同,RSD(n=7)为1.4%~7.2%。将实验方法应用于4个不同产地锰矿中铜、铅、锌、镍、钴的测定,各个元素的加标回收率均在95.9%~104.3%之间。
In this paper,the method of acid dissolution was improved,which can fully decompose the sample and avoid the tedious process of collecting residue to sample loss and alkali melting in the traditional digestion method.Finally,a method for the determination of impurity elements in manganese ore by flame atomic absorption spectrometry was established.This method shortened the sample digestion time and improved the analytical efficiency of atomic absorption spectrometry.The experiment showed that under the selected instrument conditions,the correlation coefficients of the calibration curves of copper,lead,zinc,nickel and cobalt were greater than 0.9962.The detection limit of the method was 0.019-0.273μg/mL.The measured value obtained by this method was almost the same as that obtained by ICP-AES,with RSD(n=7)of 1.4%-7.2%.The method has been applied to the determination of copper,lead,zinc,nickel and cobalt in four manganese ores from different places of origin.The recoveries of each element were 95.9%-104.3%.
作者
王虹
魏秉炎
杨金坤
WANG Hong;WEI Bing-Yan;YANG Jin-Kun(Chemicals,Minerals&Metallic Materials Inspection Center of Tianjin Customs,Tianjin 300457)
出处
《中国口岸科学技术》
2022年第12期47-51,共5页
China Port Science and Technology
关键词
火焰原子吸收光谱法
锰矿
铜
铅
锌
镍
钴
ame atomic absorption spectrometry(FAAS)
manganese ore
copper
lead
zinc
nickel
cobalt
