Abstract:

The goal of this study was to improve the reproducibility and objectivity of determination of fish odor on cotton by nose. The static headspace-gas chromatography-mass spectrometry method was used to detect fish odor material trimethylamine in cotton fabrics and dynamics of multiple headspace extraction was discussed. Results showed that the most important influencing factor was equality temperature. The high equality temperature leads to rapid diffusion speed and sensitiveness of the material being tested. But too high the temperature results in decomposition of the material. Linearity range of this method is good, with the recovery over 90 %, detection limit 20µg/mL, and RSD 5.98%. This method is simple, rapid and accurate, and can be applied for determining the fish odor in the cotton fabrics. And the concentration of trimethylamine varying with time conforms to the first-order reaction dynamics.