@article{oai:barrel.repo.nii.ac.jp:00004245,
 author = {片岡, 正光 and 高橋, 真彦 and 神原, 富民},
 issue = {3},
 journal = {分析化学},
 month = {Mar},
 note = {タングステン(VI)及びバナジウム(V)は,ペルオキソホウ酸-ヨウ化物イオンの酸化還元反応を触媒する.反応混液中のヨウ化物イオンの消費速度を,ヨウ化物イオン選択性電極を用いて追跡し,反応速度と触媒量との関係から,触媒金属イオンを定量した.反応混液中のペルオキソホウ酸ナトリウム,ヨウ化カリウム及び硫酸濃度の最適値は,タングステン(VI)の定量においては,それぞれ12.5mM,60μM及び75mM,バナジウム(V)の定量においては,12.5mM,50μM及び30mMであった.この条件を用いて,タングステン(VI)は0から6.0μMまで,バナジウム(V)は0から100μMまでが定量可能である.又,妨害イオンについても検討を行った.
The oxidation of iodide ion by peroxoborate ion takes place in acidic milieu and is catalyzed by a trace amount of tungsten(VI) or vanadium(V). When the concentrations of peroxoborate and sulfuric acid were kept in a large excess in comparison with that of iodide ion, the reaction rate was proportional to the product of catalyst and iodide ion concentrations. The reaction rate was followed by measuring the concentration of iodide ion by means of an iodide ion-selective electrode. The appropriate reaction conditions were decided graphically. The most suitable concentrations of sodium peroxoborate, potassium iodide and sulfuric acid for the determination of tungsten(VI) were found to be 12.5 mM, 60 μM and 75 mM, respectively, and for the determination of vanadium(V), they were 12.5mM, 50 μM and 30 mM. A calibration curve of good linearity was obtained over concentration range 0 to 6.0μM of tungstate. The calibration curve for orthovanadate showed also a good linearlity in the concentration range below 40 μM, but deviated at the higher concentration. However, the determination up to 100 μM was feasible. Interferences of diverse ions were tested, among which Fc(III) and Mo(VI) interfered strongly.},
 pages = {169--173},
 title = {ペルオキソホウ酸-ヨウ化物イオンの反応を利用したタングステン(VI)及びバナジウム(V)のヨウ化物イオン電極による接触分析},
 volume = {28},
 year = {1979}
}