非抑制型离子色谱法检测矿泉水中硅酸盐  

Determination of Silicate in Mineral Waters by Non-Suppressed Ion Chromatography

作　　者：刘肖[1] 蔡亚岐[1] 刘京生[1] 牟世芬[1] 

机构地区：[1]中国科学院生态环境研究中心环境化学与生态毒理学国家重点实验室,北京100085

出　　处：《净水技术》2006年第5期69-71,共3页Water Purification Technology

基　　金：国家重点基础研究计划(973项目);国家自然科学基金(NO.20475060);中国科学院优秀博士论文科研基金资助

摘　　要：该文介绍了一种采用阴离子色谱交换柱进行分离,非抑制型电导离子色谱法检测,直接进样测定矿泉水中硅酸盐(偏硅酸)含量的方法。选择的色谱条件为：氢氧化物选择性的IonPae AS11-HC阴离子交换柱,淋洗液自动发生装置在线产生KOH梯度淋洗,非抑制型电导检测。样品无需任何前处理直接进样。此方法具有选择性好,操作简单,适用性广,节省时间,对环境友好等特点,用于实际样品测定,所得结果令人满意。This paper introduced a method in which samples were directly injected and followed by separating analytes by ion Chromatography and detecting silicate in mineral waters by non-Suppressed conductivity detector. The separation of silicate was obtained by IonPac AS11-HC column which is a hydroxyl selective column, and KOH gradient eluent obtained by Eluent Generator was selected. In analysis of a standard solution of silicate of 25 mg/L, the relative standard deviations of retention time, peak and height of chrematogram obtained were 0.18% ,0.94% and 0.82% respectively. In standard solution addition analysis, a recovery rate obtained was 92%-106% when 25mg/L or 2mg/L were added to water samples with concentrations of silicate around 25 mg/L or 2.5mg/L.

关 键 词：离子色谱 硅酸盐 非抑制型电导检测 矿泉水 

分 类 号：O623.731[理学—有机化学]