DETERMINATION OF AMMONIUM AND OTHER MAJOR CATIONS IN RIVER AND RAIN WATER BY ION CHROMATOGRAPHY USING SILICA-GEL AS AN ION-EXCHANGER

被引:43
作者
IWACHIDO, T [1 ]
IKEDA, T [1 ]
ZENKI, M [1 ]
机构
[1] OKAYAMA UNIV SCI,FAC SCI,DEPT CHEM,OKAYAMA 700,JAPAN
关键词
ammonium; calcium; ion chromatography; magnesium; oxalic acid; potassium; rain water; river water; Silica gel column; sodium;
D O I
10.2116/analsci.6.593
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The separation of NH4+ from Na+, K+, Mg2+ and Ca2+ on silica gel columns was investigated using natural water samples and lithium oxalate as a retention modifier. The pore size of silica gels was found to be the most important factor affecting the retention of the cations. When a 0.0025 mol dm-3 lithium oxalate solution of pH 7 was used as the mobile phase these cations could be completely separated on a short silica-gel column (Develosil 30-3, 35 mm×4.0 mm i.d.) within about 20min. NH4+ contents in river (0.01 -0.27ppm) and rain (1-1.8ppm) water samples were determined successfully. © 1990, The Japan Society for Analytical Chemistry. All rights reserved.
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页码:593 / 597
页数:5
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