三抑制柱离子色谱提高阴离子电导响应的研究-昆明理工大学学报.PDFVIP

28 6 ( ) Vol. 28 No6 2003 12 Journal of Kunming University of Science and Technology (Science and Technology) Dec. 2003 王 红, Peter D. Car enter ( 1. , 650093; 2. ) - : 研究了在离子色谱中采用三级抑制柱成功地使弱酸阴离子( X ) 发生三级离子交换, 即: - - X HXNaXNaOH. 与两级抑制体 相比, 第三级交换可使醋酸根离子( Ac ) 的峰高增大约 110%. 且由二级( HX NaX) 到三级(HXNaOH) 体 使电导检测性能提高的理论讨论与事实相 符, 并对第三 个抑制柱中的抑制剂的种类及浓度进行了比较, 5 mmol/LNaOH 最佳. : 离子色谱; 抑制柱; 阴离子 :O657. 7 5 :A : 1007- 855X( 2003) 06- 0161- 04 Enhancement of Conductivity Detection of Anions in Ion Chromatography by Using Three Suppressors WA NG Hong, Peter D. Ca rpenter ( 1. Faculty of Science, Kunming University of Science and Technology , Kunming 650093, China; 2. De artment of A lied Chemistry , RMIT University, Melbourne, Victoria 3001, Australia) Abstract: Three commercial micromembrane su ressors have been successfully used to effect the ion exchanges - - by which the weak acid anion ( X ) is converted to sodium hydroxide ( NaOH) , that is, X HX NaX NaOH. The third conversion effectively increases the eak height by some 110% for acetate, com ared with the first two su ressor system . The theoretical discussion on the enhancement of conductivity from HX/NaX to HX/ NaOH airs is consistent with ex erimental results. Different reagents, at a range of concentrations, are dis- rd cussed. 5 mmol/ L NaOH is selected as the o timum concentration for the 3 su ressor reagent. Key words: IC; su ressor; anions ,