DELAYED FLUOROMETRIC ANALYSIS OF ZINC WITH meso-TETRAPHENYLPORPHINETRISULFONIC ACID

概要

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Thermally activated delayed fluorometry (TADF) was applied to the trace analysis of zinc by using meso-tetraphenylporphinetrisulfonic acid (TPPS3>. Metalation of TPPS3 with zinc ion was accomplished in 0.5 mol dm^<-3> sodium hydroxide solution at 60℃ for 30 min. After cooling the solution, the product was adsorbed on filter paper by dipping the paper in the reaction mixture. The TADF intensity of Zn-TPPS_3 adsorbed on the filter paper which was dried at 60℃ for 30 min was measured. A linear relationship between zinc concentration and TADF intensity was recognized in the wide range of 1 ppb to 162 ppb. The effects of foreign metal ions, Cd(II), Fe(III), Cr(III), Pb(II), In(III), Sn(II), Cu(II) andNi(II), which are typical interfering metals on the determination of zinc by fluorometry and absorption spectroscopy, were studied, and it was found that twenty three fold amount of Cd(II) and forty six-fold amounts of Fe(III), Cr(III), Pb(II), In(III), Sn(II), Cu(II) and Ni(II) did not interfere with the determination of zinc.
社団法人日本分析化学会の論文
1984-01-05