茶叶内含物质与外源污染物在冲泡过程中的浸出规律

陈红平; 刘新; 鲁成银; 邱静

doi:10.13305/j.cnki.jts.20200117.008

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茶叶科学 ›› 2020, Vol. 40 ›› Issue (1) : 63-76. DOI: 10.13305/j.cnki.jts.20200117.008

茶叶内含物质与外源污染物在冲泡过程中的浸出规律

陈红平^1,2,3, 刘新², 鲁成银^2,*, 邱静^1,*

作者信息 +

Leaching Pattern of Internal Substances and Xenobiotic Pollutants during Tea Brewing

CHEN Hongping^1,2,3, LIU Xin², LU Chengyin^2,*, QIU Jing^1,*

Author information +

文章历史 +

摘要

在收集相关文献的基础上,总结分析茶叶内含物质、农药残留与金属元素在茶汤中的浸出规律。化合物的理化性质和茶叶冲泡方法是影响浸出率的内因和外因,其中内因起着决定性作用。茶汤中化合物浸出率与水溶解度呈正相关,与辛醇-水分配系数（辛醇/水）呈负相关。冲泡水温升高能显著提高茶叶内含物质与外源污染物的浸出率及其在茶汤中的浓度,冲泡时间与化合物浸出速率呈负相关,但随着时间增加,茶汤中化合物的浓度显著提高。新烟碱类农药和氨基甲酸酯类农药浸出率较高,大部分农药浸出率高于60%。金属元素在茶汤中的浸出率研究结果相差较大,氟、镍、钴在茶汤中浸出率较高,达到50%以上,铅的浸出率在20%~50%。基于质谱分析代谢组学技术将在茶叶冲泡过程的化学物质浸出规律研究中发挥重要作用,热力学理论基础和传质动力学模型将有利于更深层面认识外源有害物质在茶汤中的浸出行为。

Abstract

Based on the recent literatures, the dissolving, releasing and transformation patterns of tea internal compounds and exogenous contaminants were summarized and discussed in this study. Physicochemical properties of chemicals and tea brewing methods are the internal and external cause affecting extraction rates of chemicals during tea brewing. Internal cause plays a crucial role in extraction rates, while external cause is more prominent for the leaching of tea internal substances. Water solubility of chemicals is positively correlated with extraction rates, while octanol-water partition is negatively correlated with extraction rates. Increasing water temperature is helpful for increasing extraction rates of chemicals and their concentrations in tea infusion. Brewing time is negatively correlated with extraction rates in a period of time, while the concentrations of chemicals in tea infusion increase with the brewing time. Compared with other pesticides, most of neonicotine pesticides and carbamate pesticides have higher extraction rates over 60%. The results of extraction rates of metal elements in tea infusion are quite different, and extraction rates of fluorine, nickel and cobalt have high extraction rates over 50%, while extraction rates of lead range from 20% to 50%. Metabonomic analysis based-high resolution mass spectrometry technique is a promising and powerful method for profiling extracting pattern of chemicals during tea brewing. Meanwhile, extracting behavior of toxic compounds during tea brewing will be deeply understood by using thermodynamic theory and kinetic model of mass extraction.

导出引用

陈红平, 刘新, 鲁成银, 邱静. 茶叶内含物质与外源污染物在冲泡过程中的浸出规律[J]. 茶叶科学. 2020, 40(1): 63-76 https://doi.org/10.13305/j.cnki.jts.20200117.008

CHEN Hongping, LIU Xin, LU Chengyin, QIU Jing. Leaching Pattern of Internal Substances and Xenobiotic Pollutants during Tea Brewing[J]. Journal of Tea Science. 2020, 40(1): 63-76 https://doi.org/10.13305/j.cnki.jts.20200117.008

中图分类号： S571.1 TS201.6

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