活性炭和树脂是白酒行业处理基酒达到去除异味和提升品质的常用手段。该研究以理化指标变化、感官变化、重要风味物质含量变化为指标,探究活性炭和大孔树脂处理对糟烧酒风味的影响。结果显示,在理化指标方面,弱碱性大孔树脂对总酸和总酯的损失率最小,分别为6.11%和4.76%。在感官变化方面,活性炭处理后的酒样中果香、糟味和刺激性显著下降,树脂处理后的酒样中果香、花香、糟味和刺激性显著下降,不同树脂处理后青草香和粮食香变化不同。在风味物质变化方面,椰壳活性炭对酯类物质的保留效果最好(52.89%~86.74%),对除苯甲醛和正己醛外的醇醛类物质的保留效果最低(<50%);树脂中弱碱性大孔树脂对酯类物质的保留率最高(41.74%~90.73%),对醇类物质的保留率最低(32.82%~60.52%),强碱性大孔树脂对苯甲醛以外的醛类物质的保留率最低(0%~54.17%)。综合各指标结果,弱碱性大孔树脂是一种能够降低糟烧酒中的刺激性和糟味,同时较好保留原酒风味物质的处理技术,弱碱性大孔树脂的最佳动态吸附参数为上样量8 BV、上样流速5 BV/h。
Activated carbon and resin are commonly used in the Baijiu industry to remove odor and improve the quality of base liquor.In this study, the effects of activated carbon and macroporous resin treatments on the flavor of ZaoShao Baijiu were investigated using changes in physical and chemical indexes, sensory changes, and changes in the content of important flavor substances as indicators.Results revealed that, in terms of physical and chemical indicators, weakly alkaline macroporous resin showed the least loss of total acids and total esters, with 6.11% and 4.76%, respectively.In the aspect of sensory changes, there was a significant decrease in fruity aroma, distilled grain off-odor, and irritation in the activated carbon-treated samples, a significant decrease in fruity aroma, floral aroma, distilled grain off-odor, and irritation in the resin-treated samples, and different changes in grassy aroma and grain aroma after different resin treatments.In the sense of flavor substance changes, coconut shell activated carbon had the best retention effect on esters (52.89%-86.74%) and the lowest retention effect on aldehydes except for benzaldehyde and hexanal (<50%).Among the resins, weakly alkaline macroporous resins had the highest retention of esters (41.74%-90.73%) and the lowest retention of alcohols (32.82%-60.52%), and strongly basic macroporous resins had the lowest retention of aldehydes other than benzaldehyde (0%-54.17%).Based on the results of the indicators, weakly alkaline macroporous resin is a processing technique that could reduce the irritation and distilled grain off-odor in ZaoShao Baijiu while better retaining the original alcohol flavoring substance.The best dynamic absorption parameter of weakly alkalized porous resin was measured at 8 BV, and the flow rate was 5 BV/h.
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