抄録
Titration of the alkaloids in the Japanese Pharmacopoeia and some weak bases were carried out with high frequency titration apparatus. Good results were obtained by the use of a mixed solvent of alcohol and water for substances which tend to give a curve by the strength of dissociation. In general, substances with dissociation constants over 10-9 can be determined well. The amount of samples needed is usually around 30 mg., and the error, approximately 0.5-1%.
