DX-300离子色谱测定山地冰川雪冰中的有机酸与无机酸阴离子

 利用AS4A SC分离柱 ,AG4A SC保护柱 ,ASRS Ⅱ抑制器 ,TAC 2阴离子富集柱和ATC 1阴离子捕集柱 ,以四硼酸钠 (Na2 B4O7)为淋洗液试剂 ,2 5mmol/LH2 SO4为化学抑制的再生液 ,采用梯度淋洗方式 ,对中国天山乌鲁木齐河源一号冰川雪冰中的生物有机酸和无机酸阴离子进行了测试分析。 2mL雪冰融水样品可在 16min内通过一次进样检测出氟离子、乙酸根离子、甲酸根离子、丙酮酸根离子、一氯乙酸根离子、氯离子、亚硝酸根离子、溴离子、硝酸根离子、磷酸根离子、硫酸根离子和草酸根离子共 10多种有机酸和无机酸阴离子。

Determination of Organic and Inorganic Anions in Snow and Ice from Alpine Glaciers with DX-300 Ion Chromatograph

Organic and inorganic anions in snow and ice from Glacier 1 at Urumqi river head, Tianshan Mountain, Xinjiang, Northwest China, were determined using DIONEX-300 ion chromatograph with a lot of columns. AS4A-SC was selected as the separation column, AG4A-SC as the guard column, TAC-2 as the anion enrichment column, ATC-1 as the anion trap column and ASRS-II as the suppresser. It was conducted under gradient elution with sodium tetraborate (Na2B4O7) as eluent and 25 mmol/L H2SO4 as regeneration solution for chemical suppression. By preconcentration, 2 mL melted water of snow or ice can be analyzed for separation and quantitation of more than 10 anions, which were fluoride, acetate, formate, pyruvate, monochloroacetate, chloride, nitrite, bromide, nitrate, phosphate, sulfate and oxalate. The relative standard deviations for most of the anions were below 5%.