@article{oai:soar-ir.repo.nii.ac.jp:00017631,
 author = {原,  信},
 journal = {信州大学教養部紀要. 第二部, 自然科学},
 month = {Feb},
 note = {A rapid method for the determination of potassium, which involves the precipitation of potassium as tetrafluoroborate and the subsequent titration of liberated acid by the decomposition of it, is presented in the present study. Below 5℃, potassium is quantitatively precipitated in the solution containing anyone of the the tert-butyl alcohol, iso-propyl alcohoL or ethyl alcohol in the concentration of 70%, and 0.2N hydrochloric acid, when the tetrafluoroboric acid is added to the concentration of about 5%, In this case the tetrafluoroboric acid must contain a small excess of the free hydrofluoric acid, This precipitate is filtered and may be decomposed and titrated easily by the process established befor. When the tert-butyl alcohol is used, sodium does not interfere even if its quantity is equal to potassium., Article, 信州大学教養部紀要. 第二部, 自然科学 4: 17-25(1970)},
 pages = {17--25},
 title = {フルオロホウ酸塩中和滴定法によるカリウムの定量},
 volume = {4},
 year = {1970}
}