摘要
研究了流动注射在线液液萃取技术，设计了一种既适用于水相又适用于有机相光度分析的流通池，进行了地质样品中痕量碘的在线萃取及光度测定，方法的富集因子５０，富集效率２５，测定样品速度为３０样次／ｈ，检出限为３８μｇ／Ｌ，对于２０μｇ／Ｌ的Ｉ－，其ＲＳＤ（ｎ＝１１）为１７％，方法用于水系沉积物和土壤标样中碘的验证。
A liquid liquid flow extraction system associated with a specially designed flow through cell suitable for both aqueous and organic spectrophotometric analysis has been developed. The system is applied to on line solvent extraction separation and spectrophotometric determination of iodine in geological materials. The detection limit is 3.8 μg/L for I - with the precision of 1.7% RSD for 20 μg/L of I -( n =11). The sample throughout is 30/h and the concentration efficiency is 25. The results obtained from the standard reference materials are in good agreement with certified values.
出处
《岩矿测试》
CAS
CSCD
北大核心
1996年第3期222-225,共4页
Rock and Mineral Analysis
基金
地矿部八五重点科技项目资助
关键词
流动注射液
液萃取
分光光度法
地质样品
continuous flow liquid liquid extraction, iodine, spectrophotometry
