Compact, field-portable capillary ion chromatograph

被引:46
作者
Boring, CB
Dasgupta, PK [1 ]
Sjögren, A
机构
[1] Texas Tech Univ, Dept Chem & Biochem, Lubbock, TX 79409 USA
[2] Umea Univ, Dept Analyt Chem, S-90187 Umea, Sweden
关键词
instrumentation; ion chromatography; eluent generation; electrodialytic; environmental analysis; inorganic anions; organic acids;
D O I
10.1016/S0021-9673(98)00139-3
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
We describe a fully computer controlled, field-portable capillary scale suppressed conductometric ion chromatograph that fits in a standard briefcase (28x43x15 cm) and weighs 10 kg. The system uses an electrodialytic sodium hydroxide generator on the high-pressure side of a syringe pump. This provides isocratic or gradient operation with excellent eluent purity. A 100 nl loop-volume, electrically actuated valve is used for sample injection and allows for facile automation. Analytical columns, 50 cmx180 mu m I.D., were packed in the laboratory using commercial packing and fused-silica capillaries. A novel flow-through conductivity detection cell was developed. The system provides detection limits in the sub- to low ppb range, with mass limits of detection >100 times better than standard IC systems. Sample preconcentration is demonstrated with a concentrator column, 10 cm in length. (C) 1998 Elsevier Science B.V.
引用
收藏
页码:45 / 54
页数:10
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