@article{oai:u-ryukyu.repo.nii.ac.jp:02006908,
 author = {兼島, 清 and 当真, 当美 and 与那原, 岺子 and Kaneshima, Kiyoshi and Toma, Tomi and Yonahara, Mineko},
 issue = {13},
 journal = {琉球大学理工学部紀要. 理学編, Bulletin of Science & Engineering Division, University of Ryukyus. Mathematics & natural sciences},
 month = {Jun},
 note = {An absorptiometric method for the determination of the trace of manganese in the floating particles in the sea with leuco-malachite green was studied. The effect of pH, the amount of potassium periodate and leuco-malachite green, the standing period after the color development, temperature and effects of 15 foreign ions were examined. The recommended procedure was as follows: A floating particle sample which was collected from the sea water with millipore filter was dissolved in concentrated sulfuric acid and was evaporated to dryness on a hot plate by the addition of 30% hydrogen peroxide. The residure was dissolved in water, and silica was removed by filtration. The solution is diluted to 50 ml with water, and 5 ml of acetic acid and sodium acetate buffer solution (pH 4.1), 2 ml of 10% solution of hydroxylamine hydro･chloride, and 1 ml of 0.1% solution of bathophenanthroline in ethylalcohol were added to it. Fe(2)-B.P.T. complex was extracted into 10 ml of iso-amyl-alcohol, and 2 ml of concentrated sulfuric acid was added to iron free aqueous solution. After evaporation of extracted solution the residure was diluted with water, and 0.001 μg-at.of manganese standard, 20 ml of acetic acid and sodium acetate buffer solution (pH 4.1) and 5 ml of 0.2% potassium periodate solution were added to it and allowed it to stand for 15 minutes. After addition of 2 ml of 0.04% leuco-malachite green aceton solution and dilution to 100 ml with water, the absorbance at 610 mμwas measured against the reagent blank., 紀要論文},
 pages = {17--26},
 title = {ロイコマラカイトグリーン試薬による海水浮遊物中のマンガンの定量法},
 year = {1970}
}