Flow-Injection Spectrophotometric Determination of Cysteine in Biologically Active Dietary Supplements

A. V. Petrova, R. Ishimatsu, K. Nakano, T. Imato, A. B. Vishnikin, L. N. Moskvin, A. V. Bulatov

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


A procedure is developed for the flow-injection spectrophotometric determination of cysteine in dietary supplements based on the formation of a reduced phosphomolybdic complex by the analyte in mixing a sample solution with a solution of ammonium 18-molybdophosphate. For the flow-injection determination of cysteine, a polymethyl methacrylate chip is fabricated, in the channels of which the analytical form was obtained and detected. The detection limit for cysteine is 3 × 10–6 M and the throughput is 240 determinations per hour. The procedure was tested in the analysis of different samples of dietary supplements; the results obtained were verified by HPLC.

Original languageEnglish
Pages (from-to)172-178
Number of pages7
JournalJournal of Analytical Chemistry
Issue number2
Publication statusPublished - Feb 1 2016

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

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