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Flow-injection determination of subnanogram amounts of manganese by catalysis of the oxidative coupling of N,N-dimethyl-p-phenylenediamine with m-phenylenediamine

✍ Scribed by Shigenori Nakano; Masahiro Nozawa; Maki Yanagawa; Takuji Kawashima

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 573 KB
Volume: 261
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(92)80189-e

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✦ Synopsis

A spectrophotometrlc flow-mJect]on method was developed for the determmatlon of subnanogram amounts of manganese@) based on Its catalytic effect on the oxldatlve couphng of N,N-dlmethyl-p-phenylenedlamme with m-phenylenedlamme m the presence of hydrogen peroxIde The catalytic actn@ was greatly enhanced by the presence of trlethylenetetramme and 1.2~dlhydroxybenzene-3,5-&sulphonate together The proposed method allows the determmatlon of as httle as 50 pg ml-' of manganese(H) with relative standard devlatlons below 3% at a rate of 25 samples h-' The method can be appbed to the determmatlon of manganese m natural waters

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