広濃度範囲に使用できる高周波滴定装置の作製
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概要
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Among high-frequency titrimeters in use heretofore, those of condensertype have deffect of unsuitable for titration above medium concentration and those of coil-type are unfit for titration at medium concentration. Improvements are necessary for the construction of an apparatus to give a response curve having a uniform slope without any breaking point from low concentration to high concentration ranges. In order to remove the extremum point of the resonance curve the sample solution mounted in a condenser-type titrimeter was electrostatically half-shielded. Also a supplementary electrode was combined with the system of coil-type titrimeter so that the sensitive range of the concentration was shifted up to the medium concentration range. The results of the investigation showed that the instrument presented here was sensitive in the range of 7 × 10<SUP>-4</SUP> 5 <I>N</I> and no extremum point appeared throughout the range of the concentration. Good results were obtained for titrimetric neutralization and precipitation titrations of silver, barium and zinc in the wide range of the concentration.
- 社団法人 日本分析化学会の論文