EAS Publisher | Comparative Analysis of Different Sampling Methods for Gases Generated During Spreading and Cooling of Nongxiang Baijiu

Comparative Analysis of Different Sampling Methods for Gases Generated During Spreading and Cooling of Nongxiang Baijiu

DOI : https://doi.org/10.36349/easjnfs.2026.v08i02.005

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Open spreading and cooling of solid-state fermented grains for strong-aroma Baijiu releases uncollected volatile aromas, resulting in flavor loss and air pollution. Four sampling methods (a constant-flow sampler and 300 W, 260 W, 220 W fans) were used to collect waste gas from a Yibin distillery; samples were enriched by Tenax-TA and analyzed via GC-MS. The constant-flow sampler afforded better peak resolution but lower total peak area (2.3×109). The 300 W fan captured the most volatiles (4.6×109 peak area). Moreover, the grain feeding inlet showed the highest collection efficiency. Constant-flow sampling fits laboratory qualitative analysis, while 300 W fan parameters guide industrial exhaust recovery, with the feed inlet recommended as the optimal sampling site.

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