熱検出カラム法による酸および塩類水溶液の濃度決定

概要

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Concentration of dilute acid or salt were determined by measurement of heat of ion exchange by using a thermistor. Anion exchange resin (NO3-type) was packed in a detection column, 5 cm in length and 8 mm in diameter, and a thermistor was inserted near the bottom on the axis of the column. The column was placed in thermostat maintained exactly at 30°C. The eluting agent was a dilute solution of acid or salt having anion common with the sample solution to be injected. When the concentration of the sample was different from that of the eluting agent, peak was appeared on the thermogram, and the peak-height was greater than the case when the cation exchange resin was packed in the detection column. By making the volume of the sample constant, the peak-heights were proportional to the concentration of sample solution, which was then determined referring to the calibration curve of peak-height vs. concentration of the standard solution.
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