首页|间歇式红外辅助热泵干燥对龙眼品质及挥发性成分的影响

间歇式红外辅助热泵干燥对龙眼品质及挥发性成分的影响

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采用不同干燥温度结合间歇式红外辅助热泵干燥龙眼,研究干燥条件对龙眼干燥特性、色泽、复水性、抗氧化活性以及挥发性成分的影响.结果表明:间歇式红外辅助热泵干燥能显著缩短干燥时间,提升干燥龙眼品质.与单一热泵干燥相比,间歇红外辅助干燥的时间可缩短25％～28.6％,复水比增加2.65％～8.21％;间歇红外辅助干燥龙眼总色差值较单一热泵干燥明显降低,色泽均匀性提升,FRAP铁离子还原力显著提高4.42％～17.95％;干燥使龙眼挥发性成分中醇类、醛类、酮类和酯类物质种类或含量增加,香叶基丙酮、正辛醇、癸酸乙酯等特有挥发性物质仅在间歇式红外辅助干燥龙眼中测得,表明间歇式红外辅助能有效丰富龙眼干的香气种类.结论:60℃热泵条件下每5 min辅助红外2 min是间歇式红外辅助热泵干燥的最优处理条件,有利于龙眼干的品质和挥发性物质的形成.
Effect of Intermittent Infrared Assisted Heat Pump Drying on the Quality and Volatile Profiles of Longan
In this study the intermittent infrared assisted heat pump was used to longan drying,and the drying charac-teristics,color change,rehydration properties,antioxidant activity and volatile profiles of longan under different drying conditions were measured.The results indicated that intermittent infrared assisted heat pump drying could dramatically shorten drying time and improved the comprehensive quality of dried longan.Specifically,the intermittent infrared assist-ed heat pump drying time of longan was reduced 25％-28.6％and the rehydration rate was increased 2.65％-8.21％when compared with the single heat pump drying.Total color change of the intermittent infrared assisted heat pump dried lon-gan was lower than the single heat pump dried longan coupled with more uniformity color distribution of dried longan pulp surface.Moreover,the higher ferric reducing antioxidant power,4.42％-17.95％,was also observed in intermittent infrared assisted heat pump dried longan.The types or content of alcohols,aldehydes,ketones,and esters in longan were increased after drying,and(E)-6,10-dimethyl-5,9-undecadien-2-one,1-octanol,and ethyl caprate were only de-tected in intermittent infrared assisted heat pump dried longan,which indicated that intermittent infrared assistant effec-tively enriched the volatile profiles of dried longan.In general,60 ℃ heat pump drying coupled with 2 min every 5 min intermittent infrared was the best assisted drying scheme in all the selected methods,which is benefit to improve the qualities and volatile profiles formation of longan.

intermittent infraredheat pump dryinglonganqualityvolatile profiles

朱经楠、彭健、谢子权、余元善、唐道邦、辜青青、徐玉娟

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江西农业大学农学院 南昌 330045

广东省农业科学院蚕业与农产品加工研究所 农业农村部功能食品重点实验室广东省农产品加工重点实验室 广州 510610

间歇式红外 热泵干燥 龙眼 品质 挥发性物质

广东省省级科技计划项目广东省农业科学院学科团队建设项目科技创新战略专项资金(高水平农科院建设)科技创新战略专项资金(高水平农科院建设)科技创新战略专项资金(高水平农科院建设)茂名市科技计划项目

2018B020241003202109TDR2019YJ-YB30092020QD-032R2022PY-QF004KJ052

2024

10.16429/j.1009-7848.2024.01.020

中国食品学报
中国食品科学技术学会

中国食品学报

CSTPCD北大核心EI
影响因子：1.079
ISSN：1009-7848
年,卷(期)：2024.24(1)
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