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Ein neues Verfahren zur spektrometrischen Analyse von Metallkomplex-Lösungen / A New Method for Spectrometric Analysis of Complex Metal Solutions

Author:
Polster, Jürgen
Source:
Zeitschrift für Naturforschung 2014 v.31 no.12 pp. 1621-1625
ISSN:
0932-0776
Subject:
absorbance, pH, spectroscopy, titration, zinc sulfate
Abstract:
A new simple method is given to analyse potentiometrically titrated and spectrophotometrically measured complex-solutions of the system AH ⇌ A + H₃O⁺ and n • A + M ⇌ MAₙ. The absorbance coefficients of the metal complex MAₙ and the stability constants can be determined for each titration step by construction of the “extinction triangle” in the (two-dimensional) absorbance (E) diagram. It is not necessary to know the absolute pH value of the solution. The titration of 2-nitroso-1-naphthol-4-sulfonic acid/zinc sulfate in water is shown as an example.
Agid:
5214820