簡易自動滴定装置

概要

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A simple automatic titration apparatus was made with a view to avoiding the personal errors which usually accompany volumetric analysis, and for ready titration. A commercial medical syringe was used as the burett. The brass shaft, which had a screw, was rotated by a small, constant speed motor, and the nut on its schaft pushed the inside tube of the syringe. Its calibration curve was a straight line, and passed through the origin. In order to examine the accuracy of the apparatus, for example, the potential of a glass, or platinum electrode vs., calomel electrode, the specific conductivity, etc., were recorded automatically. and at the same time the volumetric graduations were recorded on the left side of the recording paper with a pen combined with a photoelectric relay. Some examples of titration, i.e., neutralization, redox, and conductometric titrations, etc., were investigated with this apparatus. The results obtained had better accuracy than that of ordinary titration with an indicator. In general, manual conductometric titration is very complicated, but we could easily obtain a titration curve with the new apparatus.
社団法人日本分析化学会の論文