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Alkaline hydrolysis combined with stir-bar sorptive extraction or sonication for the determination of banned azo dyes in leather

In English

Författare

  • Lars-Henric Ahlström
  • M. Rowshanzamir
  • E. Joo
  • Lennart Mathiasson

Summary, in English

Two approaches based on alkaline hydrolysis, in combination with either stir-bar sorptive extraction (SBSE) or sonication, were developed for the determination of banned azo dyes in bovine leather. All dyes were determined indirectly by measuring their corresponding harmful amines, formed after chemical reduction. Quantification was performed by employing standard addition methodology to compensate for analyte losses due to sample preparation (e.g. incomplete extraction). The mean recoveries (n=3) obtained by employing the SBSE and sonication procedures were 100 percent (RSD=26 percent) and 114 percent (RSD=11 percent), respectively. The linearity of the standard addition curves obtained was reasonable [SBSE (mean R-2=0.980) and sonication (mean R-2=0.997)]. Both procedures were very simple to perform and provided clean LC-UV chromatograms. Taking into account the repeatability, sonication was considered the preferred alternative.

Publiceringsår

2007

Språk

Engelska

Sidor

280-287

Publikation/Tidskrift/Serie

The Journal of the American Leather Chemists Association

Volym

102

Issue

9

Dokumenttyp

Artikel i tidskrift

Förlag

AMER LEATHER CHEMISTS ASSN

Ämne

  • Analytical Chemistry

Nyckelord

  • CHROMATOGRAPHY-MASS-SPECTROMETRY
  • STANDARD ADDITION
  • WATER SAMPLES
  • AROMATIC-AMINES
  • WINE
  • LIQUID-CHROMATOGRAPHY

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0002-9726