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.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
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
关键词
毛细管离子色谱
饮用水
碘离子
硫氰酸根
草甘膦
Capillary ion chromatography
Drinking water
Iodide
Thiocyanate
Glyphosate
