摘要
卡斯特铂催化剂中氯离子浓度是产品质量控制的重要因素。本文建立了氧弹燃烧-离子色谱法测定卡斯特铂中氯离子的分析方法,采用氧弹燃烧可以将氯离子从样品中解离,进一步用离子色谱法测定吸收液中的氯离子浓度。研究了助燃剂、样品量、KOH吸收液浓度对氯离子解离吸收的影响,用优化的梯度洗脱方法,对氯离子离子色谱测定条件进行了系统考察。结果表明,在优化条件下,离子色谱法在氯离子浓度0.05~1.0μg/mL范围内具有良好的线性,加标回收率88.6%~103.5%,相对标准偏差(RSD)2.1%~7.2%,方法方法检出限(LOD)和定量限(LOQ)分别为0.013和0.043μg/mL,可满足卡斯特铂中氯离子测定的要求。
The concentration of chloride ions in Karstedt catalyst is an important factor for quality control of the products.In this paper,a method for the determination of chloride ions in the catalyst by using oxygen bomb combustion-ion chromatography was established.After chloride ions were dissociated from the sample via the oxygen bomb combustion and absorbed by KOH solution,they were measured with the ion chromatography.Effects of the combustion improver and amount of the sample and KOH concentration on the dissociation and absorption of chloride ions were investigated.Using an optimized gradient elution method,the ion chromatographic conditions were systematically investigated.The results showed that under optimized conditions,ion chromatography exhibited good linearity in a chloride ion concentration range of 0.05~1.0μg/mL,with a spike recovery of 88.6%~103.5%and relative standard deviation(RSD)of 2.1%~7.2%.The limit of detection(LOD)and quantification(LOQ)of the method were found to be 0.013 and 0.043μg/mL,respectively,satisfying the requirements for determining chloride ions in Karstedt catalyst.
作者
苏琳琳
武冰鑫
张思
韩媛
冯洋洋
余尧
雷怀东
侯文明
SU Linlin;WU Bingxin;ZHANG Si;HAN Yuan;FENG Yangyang;YU Yao;LEI Huaidong;HOU Wenming(Sino-Platinum Metals Chemical Materials(Yunnan)Co.Ltd.,Kunming 650503,China;School of Life Sciences,Yunnan University,Kunming 650500,China)
出处
《贵金属》
北大核心
2025年第2期29-33,共5页
Precious Metals
基金
云南贵金属实验室科技计划项目(YPML-20240502084)
云南贵金属实验室科技计划项目(YPML-20240502100)
国家自然科学基金地方科学基金项目(No.22462014)。
关键词
分析化学
卡斯特铂
氧弹燃烧
离子色谱
氯离子
analytical chemistry
Karstedt platinum
oxygen bomb combustion
ion chromatography
chloride ion
作者简介
第一作者:苏琳琳,女,高级工程师,研究方向:贵金属化学与分析,E-mail:sulin@ipm.com.cn;通信作者:侯文明,男,高级工程师,研究方向:贵金属化学,E-mail:hwm@ipm.com.cn。
