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Pyrolysis-flow-injection analysis-spectrophotometric determination of amino acids in aqueous solutions

✍ Scribed by J.L. Burguera; M. Burguera; M. de la Guardia; A. Salvador

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 367 KB
Volume: 261
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(92)80171-3

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✦ Synopsis

A method IS described for the determmatlon of prohne, cysteme, alanme and tyrosme in aqueous mtiures based on their pyrolttlc conversion to nitrogen-cantammg compounds These compounds undergo through peroxodlsulphate digestion with a heated capdlary tube contannng a platmum wire m a closed flow system Subsequent mwng of ahquots of the digest and a Malachite Green chromogenic reagent solution m a symmetrical system allowed the spectrophotometnc detennmatlon of nitrate at 650 nm The method IS reproducible and accurate

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