イオン交換法による河川水,工場排水,井戸水の濃縮について (原子吸光法によるカドミウム,鉛,亜鉛の分析法-1,2-)

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A method consisting of an ion exchange chromatography and the atomic absorption spectrometry has been employed for the determination of cadmium, lead and zinc in river water, industrial waste water, or well water. Various chromatographic conditions have been checked and the following procedure has been established.Five liters of water, pH being adjusted to 1.2-1.5 with a concentrated hydrochloric acid solution, was applied to a column (Dowex 50W, 40-60mesh, 100ml) at a speed of 10ml/min.Elution was performed using 600ml of a 2N hydrochloric acid solution at the flow rate of 5ml/min. The total volume of effluent was adjusted to exactly 100ml after repeated acid fuming and filtration. The concentrate was subjected to the atomic absorption spectrometry using Hitachi Model 207 Atomic Absorption Spectrometer.Utilizing the above described procedure, results obtained for river waters or industrial waste waters merging or streaming into the Jinzu River, and for well waters around this river were also shown.
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