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Untersuchungen zur indirekten mechanisierten katalytisch-spektralphotometrischen bestimmung von α-aminopolycarbonsäuren und phosphaten

Authors
Journal
Talanta
0039-9140
Publisher
Elsevier
Publication Date
Volume
26
Issue
8
Identifiers
DOI: 10.1016/0039-9140(79)80189-7

Abstract

Abstract α-Aminopolycarbonic acids and condensed phosphates are inhibitors in the iron-catalysed oxidation of p-phenetidine with hydrogen peroxide. By means of a flow-through system the inhibiting properties of seven α-aminopolycarbonic acids and technically important phosphates were investigated and the results are explained in terms of complex formation by the inhibitors. An automated determination is possible for some α-aminopolycarbonic acids (tetra-, penta- and hexa-acids) in a concentration range from 2.5 × 10 −7 to 2.5 × 10 −6 M with good reproducibility (relative standard deviation about ±2% in the middle concentration range).

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