A novel automated procedure for analysis of solid samples based on the on-line dissolution of solid sample and sugaring-out reagent in water-acetonitrile mixture coupled with sugaring-out homogenous liquid-liquid extraction was developed. The procedure was performed in a mixing chamber of a stepwise injection analysis manifold. The performance of the suggested approach was demonstrated by the determination of 2,4-dichlorobenzyl alcohol, amylmetacresol, Yellow Orange S, Azo Rubine and Ponceau 4R in pharmaceutical samples. After phase separation, the upper acetonitrile phase containing 2,4-dichlorobenzyl alcohol, amylmetacresol and lower aqueous phase containing artificial dyes were sequentially analyzed. Under optimal experimental conditions the linear ranges were found to be 0.1–10 mg L− 1 for 2,4 dichlorobenzyl alcohol, 0.5–50 mg L− 1 for amylmetacresol, and 1–100 mg L− 1 for artificial dyes. The sample throughput was 10 h− 1. The proposed method was successfully applied for the automated analysis of commercial throat lozenges and the analytical results agreed fairly well with the results obtained by reference HPLC-UV method.

Original languageEnglish
Pages (from-to)149-155
Number of pages7
JournalJournal of Molecular Liquids
StatePublished - 1 May 2017

    Research areas

  • Automation, Flow analysis, Pharmaceuticals, Stepwise injection analysis, Sugaring-out homogenous liquid-liquid extraction

    Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Materials Chemistry

ID: 9160044