초록

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Abstract ▼ AI-Helper

Volatile fatty acids (VFAs) are malodor compounds which are produced from the decomposition of animal or plant species. It is very difficult to detect VFAs due to their strong adsorptive properties. In this study we applied and optimized of various inorganic salts for volatile organic acids analys...

Volatile fatty acids (VFAs) are malodor compounds which are produced from the decomposition of animal or plant species. It is very difficult to detect VFAs due to their strong adsorptive properties. In this study we applied and optimized of various inorganic salts for volatile organic acids analysis in ambient air using alkali impregnated filter-headspace-GC/FID. The addition of NaCl, Na₂SO₄ and NaHSO₃ makes the salt-out effect, respectively. The high boiling points (41~185℃) and vapor pressures require a high temperature and long heating time for the standard sample in vials to reach an equilibrium. The analytical response was highest when the absolute quantity in the sample was 5 mL in a 22 mL vial. The addition of NaHSO₃ for the salt-out effect can give a higher sensitivity by a factor of 1.1 than that of NaCl. The mass amount of 6 g of NaHSO₃ can result in a higher sensitivity. The inorganic salt of NaHSO₃ was the most suitable extraction method for ambient volatile fatty acids with alkali impregnated filter-headspace-gas chromatography analysis.

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