毛细管离子色谱法同时测定饮用水中痕量碘离子、硫氰酸根和草甘膦  

Determination of Trace Iodide,Thiocyanate and Glyphosate in Drinking Water by Capillary Ion Chromatography

作　　者：叶明立[1,2] 胡忠阳 潘广文 

机构地区：[1]浙江大学化学系,杭州310028 [2]戴安中国有限公司上海实验室,上海201203

出　　处：《分析化学》2011年第11期1762-1765,共4页Chinese Journal of Analytical Chemistry

基　　金：浙江省自然科学基金(Nos.R4080124;Y2110945)资助

摘　　要：建立了一种采用毛细管离子色谱法同时测定饮用水中痕量碘离子（I^-），硫氰酸跟（SCN^-）和草甘膦（Glyphosate）的方法。样品经过0．22pm滤膜过滤后，直接进样5μL，采用IonPacASl9（250mm×0．4mm）毛细管色谱柱分离，KOH梯度淋洗，流速10μL／min，抑制电导检测，外标法定量。以信噪比S／N=3计算检出限，I^-，SCN^-和草甘膦的检出限分别为0．3，0．2和0．2μg／L，线性范围2．0～100μg／L，相关系数分别为0．9997，0．9998和O．9998，加标回收率为86．0％～100．6％。本方法应用于饮用水中痕量I^-SCN^-和草甘膦的测定，结果令人满意。A method was developed for the simultaneous determination of iodide, thiocyanate and glyphosate in drinking water by capillary ion chromatography （CIC）. The sample was directly injected into CIC after filtrated by 0.22 btm nylon filter membrane, and then analyzed by IC. The analytical column was Dionex IonPac AS19 （250 mm×0.4 mm） and gradient KOH was used as the eluent at a flow rate of 1.0 mL/min. The detection was performed by a suppressed conductive detector. The external standard calibration curve was used for the quantitative analysis. The linear range of the method for iodide, thiocyanate and glyphosate was 2.0-100μg/L, the correlation coefficients were 0. 9997, 0. 9998 and 0. 9998, and the detection limits （S/N=3） were 0.3, 0.2 and 0.2 μg/L, respectively. The average recoveries were 86. 0^- 100. 6%. The method has been applied to determine trace iodide, thiocyanate and glyphosate in bottled drinking water with satisfactory results.

关 键 词：毛细管离子色谱 饮用水 碘离子 硫氰酸根 草甘膦 

分 类 号：R123.1[医药卫生—环境卫生学] O657.8[医药卫生—公共卫生与预防医学]