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火试金富集—重量法测定吸银树脂中银
- 作者：
- 游玉萍|周凤飒|肖红新
- 作者单位：
- 广东省科学院工业分析检测中心|广东省科学院工业分析检测中心|广东省科学院工业分析检测中心
基金项目：
- 广东省科技专项资金（“大专项＋任务清单”）项目（江科〔2020〕182号）
详细信息：
- 作者简介：
- 游玉萍（1978—），女，高级工程师，从事有色金属分析检测与研究工作；E-mail：yyping0116@163.com
- 通讯作者：
- 肖红新（1972—），男，正高级工程师，从事冶金分析检测工作；E-mail：xiaohx168@163.com
- PDF下载
Determination of silver in silver-absorbing resin by fire assay enrichment-gravimetry
- English Author：
- Center for Industrial Analysis and Testing,Guangdong Academy of Sciences|Center for Industrial Analysis and Testing,Guangdong Academy of Sciences|Center for Industrial Analysis and Testing,Guangdong Academy of Sciences
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
研究建立了火试金富集—重量法测定吸银树脂中银含量的分析方法。将吸银树脂与试金配料混合后在坩埚中熔融、灰吹，得到银粒，银粒经洗涤、干燥后用天平直接称量，分金除去其他贵金属，二者之差即为银粒质量。实验优化了称样量、面粉用量、试金配料、银的补正系数、杂质元素等影响因素。为补正火试金处理过程中银的损失，称取与样品中银质量接近的纯银随同样品进行实验，计算补正系数。银粒质量与补正系数乘积即为样品最终的银质量。该方法测定结果的相对标准偏差为0.27 %~1.57 %，加标回收率为99.57 %~100.54 %，且与火试金富集—硫氰酸钾滴定法测定银结果一致。本方法操作简单，银富集效果好，适用于吸银树脂中银的测定。
关键词:
吸银树脂；火试金；重量法；银；补正系数；富集；试金配料
Abstract:
An analysis method is established for determining the silver content in silver-absorbing resin by fire assay enrichment-gravimetry.The silver-absorbing resin was mixed with assay flux,melted in a crucible,and cupelled to obtain metallic silver granules.After washing and drying the silver granules,their mass was directly measured using a balance.Parting is conducted to remove other precious metals,and the difference was taken as the mass of the silver granules.The method was optimized for factors such as sample weight,flour dosage,assay flux,correction coefficient for silver,and impurity elements.To account for silver losses during the fire assay,pure silver,with a mass close to the silver content in the sample,was added and a correction coefficient for pure silver was calculated.The final silver content in the sample was obtained by multiplying the mass of the silver granules by the correction coefficient.The relative standard deviation of the method ranged from 0.27 % to 1.57 %,and the recovery rate ranged from 99.57 % to 100.54 %.The results were consistent with those obtained by fire assay enrichment-potassium thiocyanate titration.This method is simple,provides effective silver enrichment,and is suitable for determining silver in silver-absorbing resin.
Keywords:
silver-absorbing resin;fire assay;gravimetry;silver;correction coefficient;enrichment;assay flux
