石墨炉原子吸收光谱法测定地质样品中微量银  

Measurement of trace silver in geological samples by graphite furnace atomic absorption spectroscopy

作　　者：黄俭惠[1] 卢汉堤[1] 

机构地区：[1]中国有色桂林矿产地质研究院有限公司,广西桂林541004

出　　处：《矿产与地质》2014年第3期381-384,共4页Mineral Resources and Geology

摘　　要：对石墨炉原子吸收光谱法测定地质样品中微量银进行了研究。样品经四酸溶解,在3mol/L 的HCl 介质中以 EDTA-抗坏血酸溶液作为基体干扰改进剂,用石墨炉原子吸收光谱法测定地质样品中微量银。方法检出限为0.051ng/mL,精密度（RSD,N=11）5.91%~12.83%。能满足地质样品中w（Ag）/10-6=0.03~5范围内银测定的准确度和精密度的要求。This article conducted research on measurement of trace silver in geological samples by graphite fur-nace atomic absorption spectrometry.After dissolved in tetracid,Trace silver in geological samples was measured by graphite furnace atomic absorption spectrometry in medium of HCl （3mol/L）while EDTA-as-corbic acid solution was used as matrix interference modifier.The detection limit was 0.05 1ng/mL,and the precision （RSD,N=1 1）was 5.91%~12.83%.The method meets the requirements on accuracy and preci-sion of silver measurement within the range of w（Ag）/10 -6 = 0.03 to 5.

关 键 词：石墨炉原子吸收 光谱法 基体改进剂 银 

分 类 号：O657.31[理学—分析化学]