超声波诱导下模型酒电导率的在线监测及其与Fe^(2+)/Fe^(3+)的变化关系  

Correlation between Fe^(2+)/Fe^(3+) and conductivity monitored on-line in the model wine induced by ultrasound irradiation

作　　者：颜艳英 王婷婷[1] 付熙哲[1] 卫晨曦 范学辉[1] 张清安[1] 

机构地区：[1]陕西师范大学食品工程与营养科学学院,陕西西安710119

出　　处：《食品与机械》2017年第1期22-26,共5页Food and Machinery

基　　金：陕西师范大学2015年研究生培养创新基金资助项目(编号:2015CXS027);国家自然科学基金青年科学基金项目(编号:31101324);陕西省自然科学基金项目(编号:2015JM3097);西安市科技局技术转移促进工程项目[编号:CXY1434(5)];中央高校基本科研业务费专项(编号:GK201404006)

摘　　要：超声波在红酒催陈的过程中会引起电导率的显著变化,但确切的机制尚不明确。文章以乙醇、酒石酸和硫酸亚铁铵为基本组分构建模型酒,在线检测其在不同超声处理条件下电导率的变化情况,同时测定模型酒中二价铁离子的含量,探讨超声诱导下模型酒电导率与铁离子的变化关系。结果显示:超声处理过程及后期存放过程中酒液的电导率呈先快速上升后下降,后又缓慢上升最终稳定的变化趋势;模型酒中二价铁离子含量降低、三价铁离子含量增加,表明超声波对模型酒电导率影响可能与铁离子价态、含量有关。试验结果为探索超声诱导红酒电导率的变化机制提供有益借鉴和理论基础,也为电导率作为超声陈化红酒过程中的检测指标提供了理论依据。Studies have shown that significant changes in electrical conductivity can be detected during the wine aging modified by ultrasound,but the mechanism of ultrasound-induced changes in electrical conductivity is unclear currently.The model wine based on ethanol,tartaric acid and ammonium ferrous sulfate has been built for on-line monitoring electrical conductivity in different ultrasonic conditions,determining the content of ferrous ion and analyzing the correlation between the changes of conductivity and ferrous ion.The results indicate that the electrical conductivity of the model wine increased firstly and then decreased,next increased slowly and remained unchanged finally in the process of ultrasonic treatment and storage.Simultaneously,the content of ferric ion increased as the ferrous ion decreased,namely,the ionic strength was increased.According to these results,ultrasound has a definite effect on the conductivity of model wine,and itis related to the valence and content of iron.These studies will provide a useful reference and theoretical basis for exploring the influence mechanism of ultrasound to wine conductivity and for the electrical conductivity as a detection index during aging of wine modified by ultrasound.

关 键 词：超声波 电导率 亚铁离子 三价铁离子 离子强度 

分 类 号：TS261.7[轻工技术与工程—发酵工程]