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No.13 (1970/06) >

 
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
Title alternative :Absorptiometric determination of the trace of Manganese in the floating particles in the sea with Leuco-malachite green
Authors :兼島, 清
当真, 当美
与那原, 岺子
Authors alternative :Kaneshima, Kiyoshi
Toma, Tomi
Yonahara, Mineko
Issue Date :30-Jun-1970
Abstract :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.
Type Local :紀要論文
Publisher :琉球大学理工学部
URI :http://hdl.handle.net/20.500.12000/23409
Citation :琉球大学理工学部紀要. 理学編 = Bulletin of Science & Engineering Division, University of Ryukyus. Mathematics & natural sciences no.13 p.17 -26
Appears in Collections:No.13 (1970/06)

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