Spectrophotometric determination of primary aromatic amines with 4-N-methylaminophenol and 2-iodylbenzoate

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Abstract

2-Iodylbenzoate is proposed as an oxidimetric agent, in the presence of 4-N-methylaminophenol, for the spectrophotometric determination of primary aromatic amines. The purple-red product absorbs maximally at 525 nm and Beer's law is obeyed over a range corresponding to 4-32 μg/ml amine in the final solution. In contrast to dichromate or N-bromosuccinimide, previously used as the oxidant, 2-iodylbenzoate avoids errors arising from too large an excess of the oxidant, instability of the coupling intermediate, and the oxidation of the amine. © 1988.

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Verma, K. K., Sanghi, S. K., & Jain, A. (1988). Spectrophotometric determination of primary aromatic amines with 4-N-methylaminophenol and 2-iodylbenzoate. Talanta, 35(5), 409–411. https://doi.org/10.1016/0039-9140(88)80037-7

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