caa a22 4500 445879408 CHVBK 20180317145537.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s00604-010-0489-8 doi (NATIONALLICENCE)springer-10.1007/s00604-010-0489-8 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 the determination of ultra trace amounts of ruthenium [Elektronische Daten] [Kunio Kawamura, Shukuro Igarashi, Takao Yotsuyanagi] Trace quantities of ruthenium(II) ion catalyze the oxidation of 5,10,15,20-tetrakis(4-sulfonatophenyl)porphine (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 investigated 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 0.11nM (equal to 10.7pgmL−1) at pH4.25, where the turnover number is 201. The reproducibility for five measurements at 2.7nM of Ru(III) was 2.9%. Figure Schematic diagram for the catalytic determination of noble metal ions Springer-Verlag, 2010 UV-visible spectrophotometry nationallicence Catalytic determination of ruthenium nationallicence Water-soluble porphyrin nationallicence Oxidative degradation of porphyrin nationallicence Platinum metal ions nationallicence Kawamura Kunio Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 980-8579, Aoba, Sendai, Japan aut Igarashi Shukuro Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 980-8579, Aoba, Sendai, Japan aut Yotsuyanagi Takao Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 980-8579, Aoba, Sendai, Japan aut Microchimica Acta Springer Vienna 172/3-4(2011-03-01), 319-326 0026-3672 172:3-4<319 2011 172 604 https://doi.org/10.1007/s00604-010-0489-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00604-010-0489-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kawamura Kunio Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 980-8579, Aoba, Sendai, Japan aut NATIONALLICENCE 700 1- Igarashi Shukuro Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 980-8579, Aoba, Sendai, Japan aut NATIONALLICENCE 700 1- Yotsuyanagi Takao Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 980-8579, Aoba, Sendai, Japan aut NATIONALLICENCE 773 0- Microchimica Acta Springer Vienna 172/3-4(2011-03-01), 319-326 0026-3672 172:3-4<319 2011 172 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer