Summary
Cadmium(II) accelerates the complex formation reaction of manganese (II) withα, β, γ, δ-tetra(p-sulfonatophenyl)porphine (H2TPPS4). Cadmium(II) concentration as low as 10−7 mol dm−3 can be determined from the decrease in absorbance at 413 nm (λmax of H2TPPS4) at a fixed time after the start of the reaction of manganese(II) with H2TPPS4. After the separation of lead(II) by coprecipitation of manganese(IV) oxide, the method is highly selective and is free from interference of most substances usually encountered. Sandell's sensitivity calculated from the calibration curve at 30 min after the start of the reaction is 1.43×10−1 ng cm−2.
Zusammenfassung
Cadmium (II) beschleunigt die Komplexbildung von Mangan (II) mitα, β, γ, δ-Tetra-(p-sulfonatophenyl)-porphin (H2TPPS4). Konzentrationen bis zu 10−7 Mol/l können durch Messung des Rückganges der Absorbanz bei 413 nm (λmax von H2TPPS4) nach einer bestimmten Zeit gemessen werden. Nach Abtrennung von Blei(II) durch Mitfällung mit Mangan (IV)oxid ist die Methode sehr selektiv und frei von Störungen durch die meisten üblicherweise vorliegenden Substanzen. Die Empfindlichkeit nach Sandell, ermittelt aus der Eichkurve 30 min nach dem Start der Reaktion, beträgt 1,43×10−1 ng/cm2.
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References
M. Tabata and M. Tanaka, Anal. Letters13, 427 (1980).
M. Tabata and M. Tanaka, V. International Symposium on Solute-Solute-Solvent Interactions, Florence, Italy, June, 1980 [Inorg. Chim. Acta40 (2), X71 (1980)].
A. D. Adler, F. R. Longo, J. D. Finarelli, J. Goldmacher, J. Assour and L. Korsakoff, J. Org. Chem.32, 476 (1967).
J. Turay, P. Hambright, and N. Datta-Gupta, J. Inorg. Nucl. Chem.40, 1687 (1978).
N. Johnson, R. Khosropour, and P. Hambright, Inorg. Nucl. Chem. Letters8, 1063 (1972).
R. G. Ball, K. M. Lee, A. G. Marshall, and J. Trotter, Inorg. Chem.19, 1463 (1980)
D. M. Collins, W. R. Scheidt, and J. L. Hoard, J. Amer. Chem. Soc.94, 6689 (1972).
J. Reid and P. Hambright, Inorg. Chim. Acta33, L135 (1979).
A. E. Martell and R. M. Smith, Critical Stability Constants, Vol. 4, New York: Plenum Press. 1977.
M. Tanaka, Mikrochim. Acta [Wien]1958, 204.
E. B. Sandell, Colorimetric Metal Analysis, 3rd ed., New York: Interscience. 1965.
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Tabata, M., Tanaka, M. A kinetic method for the determination of nanogram amounts of cadmium (II) by its catalytic effect on the complex formation of manganese(II) withα,β,γ,δ-tetra-(p-sulf onatophenyl) porphine. Mikrochim Acta 78, 149–158 (1982). https://doi.org/10.1007/BF01206701
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DOI: https://doi.org/10.1007/BF01206701