色谱2012，Vol.30Issue(4)：340-344,5.DOI:10.3724/SP.J.1123.2011.12068
在线中和富集及标准加入离子色谱法测定大气吸收液中的痕量阴离子
Determination of trace anions in atmosphere absorption solution by ion chromatography with the application of online sample neutralization, column concentration and online standard addition
摘要
Abstract
A novel ion chromatographic method was developed to directly determine trace union (Cl-, NO-2, NO-3, SO2-4) in atmosphere absorption solution with incorporation of large volume injection, online sample neutralization, column concentration and online standard addition. After comparing the results in different valve switching times and the chromatograms using different online neutralizing columns, the optimum experimental conditions were established. The application of Inguard H online neutralizing column and Carbonate Removal Device (CRD 200) eliminated the matrices OH- and carbonate. The improvement of the anion detection limit could be achieved by using large volume injection. The results showed that the detection limits of Cl-, NO-2, NO-3 and SO2-4 were 17.5, 171, 34.7, and 42. 4 ng/L, respectively. Online standard addition replaced the preparation of trace anion standard solution and avoided the low recovery of NO-2. The method has the characteristics of automatic operation, good repeatability and high efficiency, and can be applied to the detection of ultra trace anions which are hard to be determined in common ion chromatography.关键词
离子色谱法/在线中和/大体积进样/在线标准加入/阀切换/痕量阴离子/大气吸收液Key words
ion chromatography (IC)/online neutralization/ large volume injection/ online standard addition/ valve switching/ trace anions/ atmosphere absorption solution分类
化学化工引用本文复制引用
贺伟,丁卉,施超欧,杨柳,王文佳..在线中和富集及标准加入离子色谱法测定大气吸收液中的痕量阴离子[J].色谱,2012,30(4):340-344,5.基金项目
国家自然科学基金面上项目(20775070) （20775070）
