世界核地质科学2026，Vol.43Issue(1)：109-116,8.DOI:10.3969/j.issn.1672-0636.2026.01.009
电感耦合等离子体原子发射光谱(ICP-OES)法测定含碘附银硅胶中的高含量银
Determination of high content silver in silver-loaded silica gel with iodine by inductively coupled plasma atomic emission spectrometry(ICP-OES)
摘要
Abstract
Silver-loaded silica gel with iodine is a solid waste formed from the reaction of silver-loaded silica gel and radioactive iodine.The accurate determination of silver content is of great significance for studying its adsorption performance and radioactive iodine purification.Silver in silver-loaded silica gel with iodine mainly exists in the form of silver iodide,which is of high content and poorly soluble,making the accurate determination of silver quite challenging.This study aims to establish a reliable analytical method for the determination of high silver content in silver-loaded silica gel with iodine.Samples were digested using a nitric acid-hydrofluoric acid system,where nitric acid oxidizes iodide ions to iodine,which volatilizes upon heating to promote the decomposition of silver iodide,while hydrofluoric acid removes the silica gel matrix.After digestion,silver was extracted in a hydrochloric acid-thiourea medium and determined by inductively coupled plasma atomic emission spectrometry(ICP-OES).The effects of nitric acid and hydrofluoric acid dosage,hydrochloric acid concentration,and thiourea volume on the determination results were investigated.The results show that the dosage of nitric acid and hydrofluoric acid had little effect on digestion efficiency,while hydrochloric acid concentration and thiourea volume were the key factors affecting silver content.An appropriate amount of thiourea can effectively enhance silver solubility under acidic conditions.Precision and accuracy experiments were conducted on samples,with relative standard deviations(RSD)below 5%and spiked recoveries ranging from 95.8%to 104.0%.The results show that the method has good repeatability and accuracy.In conclusion,this method is suitable for the determination of high silver content in silver-loaded silica gel with iodine and provides an effective technical means for the analysis of silver in such complex matrices.关键词
含碘附银硅胶/银/碘化银/硫脲/电感耦合等离子体原子发射光谱Key words
silver-loaded silica gel with iodine/silver/silver iodide/thiourea/ICP-OES分类
化学化工引用本文复制引用
王利,谢胜凯,张良圣,陈萌,冯亚鑫,张玉钏,刘刈..电感耦合等离子体原子发射光谱(ICP-OES)法测定含碘附银硅胶中的高含量银[J].世界核地质科学,2026,43(1):109-116,8.基金项目
中国原子能科学研究院碘废物固化技术研究项目(编号:BG202306000322)资助 Supported by China Institute of Atomic Energy Iodine Waste Immobilization Technology Research Project(No.BG202306000322) （编号:BG202306000322）
