自动电位滴定法测定火试金合粒中银  

Determination of Silver in Bead from Fire Assay by Automatic Potentiometric Titration

作　　者：陈殿耿[1] 汤淑芳[1] 

机构地区：[1]北京矿冶研究总院,北京102628

出　　处：《中国无机分析化学》2016年第4期56-58,共3页Chinese Journal of Inorganic Analytical Chemistry

摘　　要：建立了自动电位滴定法测定火试金合粒中银的分析方法。试金合粒采用硝酸溶解，以硫氰酸钾溶液滴定银量。选定了仪器的最优条件，考察了酸度、共存元素对测定的影响。方法相对标准偏差为0．53％～0．89％，测定结果与硫氰酸钾滴定法和减杂质法相一致。方法的准确度和精密度均能满足分析需要，具有较强的实用性。A method for the determination of silver in bead from fire assay by automatic potentiometric titration was reported. The beads were dissolved in nitric acid, and the potassium thiocyanate standard solution was used for titration. Instrumental operating conditions were optimized, and the effects of acidity and coexistent elements on the determination of silver were also investigated. The relative standard deviations （RSDs） were between 0.53% and 0.89%. The results were consistent with those obtained by potassium rhodanide titration and impurity reduction method. The good accuracy and high precision of the method meet the requirement for silver determination.

关 键 词：自动电位滴定 火试金合粒 银 

分 类 号：O657.1[理学—分析化学] TH832.33[理学—化学]