Quantitative analysis of 2-furfural and 5-methylfurfural in different Italian vinegars by headspace solid-phase microextraction coupled to gas chromatography-mass spectrometry using isotope dilution

J Chromatogr A. 2003 Oct 31;1017(1-2):141-9. doi: 10.1016/j.chroma.2003.08.029.

Abstract

A new method was developed for the determination of 2-furfural (2-F) and 5-methylfurfural (5-MF), two products of Maillard reaction in vinegar, with head-space solid-phase microextraction (HS-SPME) coupled to gas chromatography-mass spectrometry (GC-MS). A divinylbenzene (DVB)/carboxen (CAR)/polydimethylsiloxane (PDMS) fibre was used and SPME conditions were optimised, studying ionic strength effect, temperature effect and adsorption time. Both analytes were determined by calibration established on 2-furfural-d4 (2-F-d4). The method showed good linearity in the range studied (from 16 to 0.12 mg/l), with a regression coefficient r2 of 0.9999. Inter-batch precision and accuracy were found between 14.9 and 6.0% and between -11.7 and 0.2%, respectively. Detection limit was 15 microg/l. The method is simple and accurate and it has been applied to a series of balsamic and non-balsamic vinegars.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acetic Acid / chemistry*
  • Calibration
  • Furaldehyde / analogs & derivatives*
  • Furaldehyde / analysis*
  • Gas Chromatography-Mass Spectrometry / methods*
  • Isotopes
  • Salts
  • Temperature

Substances

  • Isotopes
  • Salts
  • 5-methyl-2-furfural
  • Furaldehyde
  • Acetic Acid