D072阳离子交换树脂分离富集—电感耦合等离子体质谱法测定岩盐中的水溶性铯  

Determination of Water-soluble Cs in Rock Salt Ore by Inductively Coupled Plasma-Mass Spectrometry Using D072 Cation Exchange Resin Separation and Enrichment

作　　者：刘芳 黄瑞成 张大波 魏灵巧 罗磊 

机构地区：[1]湖北省地质局第六地质大队,湖北孝感432000

出　　处：《资源环境与工程》2016年第6期1023-1026,共4页Resources Environment & Engineering

摘　　要：以D072树脂为离子交换材料、盐酸为洗脱剂,建立离子交换树脂分离富集—电感耦合等离子体质谱法（ICP-MS）测定岩盐中水溶性铯的方法。考察吸附酸度、树脂用量、氯化钠浓度对D072树脂分离富集铯的影响,并优化静态解吸和动态解吸的实验条件。结果表明,当溶液p H值为7、氯化钠浓度为3‰、树脂用量为10 m L时,铯的吸附率可达93.6%;采用30 m L 50%盐酸分6次洗脱,铯的回收率超过90%;经分离富集后,可以在一定程度上实现铯与钠的分离,降低基体效应。方法的检出限为0.02μg/g,加标回收率在90.2%-99.9%之间,样品重复分析的相对标准偏差〈2.5%。Choosing D072 cation exchange resin and HC1 as sorbent and eluent respectively,the method of sparation andpreconcentration with ion exchange resin combining with ICP-MS is established for determination of water-soluble Cs inrock salt ore. The effects of adsorption acidity, resin volume and NaC1 concentration on separation and enrichment are inves-tigated. Static desorption and dynamic desorption are also studied. The results show that, adsorption rate reaches 93.6% atpH =7 of adsorption acidity,0.3% of NaC1 concentration and 10 mL of resin volume;recovery is more than 90% when u-sing 30 mL of 50% HC1 as elution with 6 times operations; Cs could be somewhat separated from matrix of Na with thismethod. Limit of detection for Cs is 0.02 μg/g,reeovery of standard addition is from 90.2% to 99.9% ,and RSD（ n = 10） 〈2.5%.

关 键 词：岩盐 铯 D072阳离子交换树脂 分离富集 

分 类 号：O657.63[理学—分析化学]