カワムラ　クニオ   KAWAMURA Kunio   川村　邦男    所属   広島修道大学  人間環境学部    職種   教授
言語種別	英語
発行・発表の年月	2011/01
形態種別	学術論文
査読	査読有り
標題	Catalytic activity of noble metal ions for the degradation of 5,10,15,20-tetrakis(4-sulfonatophenyl)porphine in the presence of oxidizing agent and its application to determination of ultra trace amounts of ruthenium
執筆形態	共著
掲載誌名	Microchim. Acta
掲載区分	国外
出版社・発行元	Elsevier
巻・号・頁	172(3-4),pp.319-326
担当範囲	Corresponding author
著者・共著者	◎Kunio Kawamura, Shukuro Igarashi, Takao Yotsuyanagi
概要	Trace quantities of ruthenium(II) ion catalyze the oxidation of 5,10,15,20-tetrakis(4-sulfonatophenyl)por- phine (TPPS) by potassium bromate. This reaction can be used for the determination of ultra trace amounts of ruthenium using the water-soluble porphyrin with its high molar absorbance. The scope of the reaction was investi- gated in terms of the reaction conditions and selectivity with respect to other noble metal ions. The effect of pH, concentration of bromate, the reaction time, and the type of metalloporphyrin were studied so as to optimize the method for the determination of trace amounts of Ru(III). The apparent reaction rate constant for the disappearance of TPPS (or metal-TPPS) is proportional to the root of the concentration of bromate, and directly related to that of Ru (III). The limit of detection is 0.11 nM (equal to 10.7 pg mL−1) at pH 4.25, where the turnover number is 201. The reproducibility for five measurements at 2.7 nM of Ru(III) was 2.9%.