Abstract(summary): Ion-exchanger phase absorptiometry was applied to flow analysis for trace amounts of copper in water. The increase in the absorbance of the coloured complex with 4,7-diphenyl-2,9-dimethyl-1,10-phenanthroline disulphonate, which was concentrated on-line on to an ion exchanger packed in a flow-through cell, could be measured continuously with a spectrophotometer at 484 nm. The detection limit was 0.08 ng cm 3 with 8.3 cm3 of sample solution. The proposed method permitted a highly sensitive, selective determination of copper in karst groundwater samples without any preconcentration. By measuring the copper concentration response in water after a storm, the infiltration rate of rain water from the soil zone to the underground river of a karst groundwater system could be evaluated to be about 10 20 m day 1.
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Ion-exchanger phase absorptiometry was applied to flow analysis for trace amounts of copper in water. The increase in the absorbance of the coloured ...onAcademic ；Science；Technology；Medicine；researchIon-exchanger phase absorptiometry was applied to flow analysis for trace amounts of copper in water. The increase in the absorbance of the coloured complex with 4,7-diphenyl-2,9-dimethyl-1,10-phenanthroline disulphonate, which was concentrated on-line on to an ion exchanger packed in a flow-through cell, could be measured continuously with a spectrophotometer at 484 nm. The detection limit was 0.08 ng cm−3 with 8.3 cm3 of sample solution. The proposed method permitted a highly sensitive, selective determination of copper in karst groundwater samples without any preconcentration. By measuring the copper concentration response in water after a storm, the infiltration rate of rain water from the soil zone to the underground river of a karst groundwater system could be evaluated to be about 10–20 m day−1.
