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Objective This study aims to accurately quantify two key components in Baijiu (Chinese liquor) production and quality control: acetic acid and hexanoic acid. Methods A direct injection-gas chromatography (GC) technique was used for the rapid and precise simultaneous determination of acetic acid and hexanoic acid in Baijiu. Results Using this method, the detection limit for acetic acid reached 0.012 g/L and for hexanoic acid, 0.0050 g/L. All correlation coefficients exceeded 0.999. The relative standard deviations (RSD) were 0.32% for acetic acid and 0.33% for hexanoic acid, with spiked recovery rates of 96.15% for acetic acid and 96.69% for hexanoic acid, respectively. Conclusion The new detection method proposed in this study not only overcomes the limitations of traditional detection methods and gas chromatography in many aspects but also demonstrates high efficiency, sensitivity, and excellent selectivity. This method has significant practical implications for improving the production process of Baijiu, ensuring the consistency of product flavor, and safety.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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