广东本地产茶叶矿物质元素与茶多酚含量调查分析  

Investigation of the content of multiple elements and tea-polyphenol in the tea planted in Guangdong

作　　者：黄伟雄[1] 苏祖俭 纪桂元 邵义娟 朱盼[1] 吴西梅[1] HUANG Weixiong;SU Zujian;JI Guiyuan;SHAO Yijuan;ZHU Pan;WU Ximei(Guangdong Provincial Center for Disease Control and Prevention,Guangdong Guangzhou 510430,China;Guangdong Provincial Institute of Public Health,Guangdong Guangzhou 510430,China)

机构地区：[1]广东省疾病预防控制中心,广东广州510430 [2]广东省公共卫生研究院,广东广州510430

出　　处：《中国食品卫生杂志》2022年第1期60-63,共4页Chinese Journal of Food Hygiene

摘　　要：目的调查广东省当地种植的茶叶矿物质元素和茶多酚含量范围、成分差异及分布特征。方法采集2017—2018年广东省7个茶叶产区具有代表性的茶叶(绿茶、乌龙茶、红茶)样品,按照国标法对样品中的9种矿物质元素和茶多酚的含量进行测定,对比分析不同种类、不同产区中矿物质元素和茶多酚的含量差异。结果乌龙茶中钾元素的平均含量为19.0 g/kg,钙的平均含量为3.29 g/kg,均高于红茶和绿茶,绿茶中铁元素的平均含量为0.174 g/kg,高于乌龙茶和红茶,镁、磷、锰、硒、锌元素在3种茶叶中的含量区别不大。绿茶的茶多酚和儿茶素含量高于乌龙茶和红茶,不同茶叶中表儿茶素没食子酸酯含量普遍高于其他4种儿茶素。潮州产茶叶中钾元素含量,梅州产茶叶锰、铁元素含量,韶关产茶叶磷、锌、硒含量高于其他产区。乌龙茶和绿茶的茶多酚含量变化与磷、锌、铜元素的含量存在一定的正相关。结论广东省当地产茶叶富含钾、钙、镁、铁、锰等矿物质元素,各茶叶产区矿物质含量存在地区性差异。Objective To investigate the contents of eight elements and tea-polyphenol in the common tea grown in Guangdong.Methods Three kinds of representative tea samples(green tea,oolong tea and black tea)were collected from seven tea producing areas in Guangdong Province from 2017 to 2018.The contents of eight mineral elements and tea polyphenols were measured and compared in the tea from different producing areas with national standard method.Results The tea planted in Guangdong are rich in macroelements(K,Ca and Mg)and microelements(Fe,B and Mn).The contents of potassium and calciumiron in oolong tea were 19.0 and 3.29 g/kg;the contents of iron in green tea was 0.174 mg/kg;the contents of Mg,P,Mn and Se in the three kinds of tea were similar.The contents of tea polyphenols and catechins in green tea were higher than those in oolong and black tea,and the contents of epigallocatechin gallate in different teas were generally higher than those of the other four catechins.The content of K in the tea from Chaozhou,Mg and Fe in the tea from Meizhou,P,Zn and Se in the tea from Shaoguan were higher than those from other areas.Conclusion The tea planted in Guangdong are rich in macroelements(K,Ca,Mg)and microelements(Fe,B,Mn).There are differences in the mineral content of each tea producing area.

关 键 词：茶叶 矿物质元素 茶多酚 

分 类 号：R155[医药卫生—营养与食品卫生学]