食品科学 ›› 2012, Vol. 33 ›› Issue (5): 102-105.doi: 10.7506/spkx1002-6630-201205023

• 基础研究 • 上一篇    下一篇

葡萄烈酒降度过程中电化学参数在线分析

张 宁,杨 星,曾新安,彭华锋   

  1. 1.长沙理工大学化学与生物工程学院 2.云南高原葡萄酒有限公司 3.华南理工大学轻工与食品学院
  • 出版日期:2012-03-15 发布日期:2012-03-03
  • 基金资助:
    广州市科技攻关计划项目(09A32080517);粤港关键领域重点突破项目(2008A024200002)

On-line Analysis of Electrochemical Properties of Grape Spirit during Dilution

ZHANG Ning,YANG Xing,ZENG Xin-an,PENG Hua-feng   

  1. 1. College of Chemistry and Bioengineering, Changsha University of Science and Technology, Changsha 410004, China; 2. Yunnan Highland Wine Co. Ltd., Mile 6332435, China;3. College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China
  • Online:2012-03-15 Published:2012-03-03

摘要: 对体积分数85.0%乙醇即蒸葡萄烈酒进行降度处理,同时采用多参数分析仪对酒中pH值、溶解氧(DO)值、氧化还原电位(ORP)值和电导率变化情况进行在线检测。结果表明:在葡萄烈酒降度工序中,由于体系内分子间非离子化质子交换、氢键缔合结构的分离再重组以及非酒精挥发物质等影响,其电化学参数有如下变化:pH值先升高后下降,在5.10左右稳定;DO值变化趋势为逐渐升高,并在7.75mg/L时达到饱和;ORP值为先下降而后缓慢阶梯式上升,最终在106mV左右稳定;电导率缓慢上升至37.2μS/cm,有继续升高的趋势。

关键词: 葡萄烈酒, 降度, 电化学参数, 在线检测

Abstract: Grape spirit with a 85.0% alcohol content was diluted with soft water to 40.2%, various electrochemical properties including pH, dissolved oxygen (DO) value, oxidation reduction potential (ORP) value and conductivity were on-line measured using a multi-parameter analyzer in this study. It was demonstrated that during the dilution process, the pH value increased first, then declined, and finally reached a stable value of 5.10.The DO value increased gradually until saturation was reached.The ORP value decreased sharply at first and then increased step by step to a stable value. On the other hand, the conductivity gradually increased during the whole dilution process.

Key words: spirit, dilution, electrochemical properties, on-line measurement

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