摘  要：建立一种同时测定镀膜液中常见酸根离子（如F-、Cl-、NO3-、SO42-、PO43-）和有机酸（如甲酸、乙酸、草酸、柠檬酸等）的离子色谱方法，用IonPac AS19阴离子交换柱为分离柱，以淋洗液自动发生装置产生KOH进行梯度淋洗。在优化的色谱条件下，即色谱柱温度为30 ℃，流速为1.00 mL/min，采用电导检测器，在20 min内能实现上述5种常见酸根离子和4种有机酸的分离和检测。用于标准样品检测时，其均呈现出良好的线性关系，相关系数在0.999 2~0.999 8之间。将该方法应用于3种不同镀膜液的测定，样品加标回收率在85.4%~112%之间。该方法简便快速，灵敏度高，准确性好，可广泛用于镀膜液中常见的酸根离子和有机酸的同时测定。
关键词：离子色谱法；镀膜液；酸根离子；有机酸
中图分类号：TF123.1+4；O657.7+5；TG115.3+1；O611.63   文献标志码：A     文章编号：1674-5124（2013）05-0056-03
Simultaneous determination of five anions and four organic acids in film plating
solution by ion chromatography
YANG Wei-qun， YU Hong-yan
（School of Biological and Chemical Engineering，Taizhou Vocational and Technical College，
Taizhou 318000，China）
Abstract: A chromatographic method was established for simultaneously determining five acid anions （F-， Cl-， NO3-， SO42- and PO43-） and four organic acids （methanoic acid， ethanoic acid， ethanedioic acid and citric acid）. The separations of common anions were obtained by IonPac AS19 column with KOH gradient. The optimal chromatographic conditions were using a conductivity detector， at a flow rate of 1.00 mL/min and a chromatographic column was operated at 30℃. Under the optimal conditions， five acid anions and four organic acids were successfully separated within 20 min. The calibration curves showed good linearity with correlation coefficients （0.999 2~0.999 8）. When the method was applied to determine three kinds of film plating liquid， the sample recoveries were in the range of 85.4% to 112%. This method was simple， rapid， sensitive and reliable， which is suitable for simultaneously determining acid anions and organic acids in film plating solution.
Key words: ion chromatography； film plating solution； acid anion； organic acid