PDF《吉林省代用茶中铅含量检测分析及限量标准建议》

第10 卷第6期食品安全质量检测学报Vol.

10 No.

6 2019 年3月Journal of Food Safety and Quality Mar. ,

2019 *通讯作者: 李媛媛, 博士, 高级工程师, 主要研究方向为营养与食品安全.E-mail: [email protected] *Corresponding author: LI Yuan-Yuan, Ph.D, Senior Engineer, Jilin Institute for Food Control, No. 2366, Yiju Street, Gaoxin District, Changchun 130103, China. E-mail: [email protected] 吉林省代用茶中铅含量检测分析及限量标准建议 刘斌1,吴桐1,

2 , 刘文竹 1,

2 , 王伟1,戴欣1,

2 , 郭金萍 1,

2 , 何伟1,李媛媛 1* (1. 吉林省食品检验所, 长春 130103;

2. 吉林省安信食品技术服务有限责任公司, 长春 130033) 摘要: 目的 测定吉林省特色代用茶中铅含量, 并对地方特色代用茶中铅限量标准的设定提出建议.方法 在 吉林省流通领域购买代用茶样品

69 份, 采用微波消解法对样品进行处理, 用石墨炉原子吸收光谱法测定样品中的 铅含量.结果 在本次检测的

69 份代用茶样品中, 铅检出率为 82.6%, 所有样品中铅的含量均低于 5.0 mg/kg. 结论 目前吉林省不同种类代用茶中铅含量都不高, 但是仍然需要尽快修订铅含量限量标准, 便于质量安全监管. 关键词: 吉林省;

代用茶;

铅;

标准 Detection and analysis of lead content in tea substitutes in Jilin province and suggestions on limit standard LIU Bin1 ,WU Tong1,2 , LIU Wen-Zhu1,2 , WANG Wei, DAI Xin1,2 , GUO Jin-Ping1,2 , HE Wei1 , LI Yuan-Yuan1* (1. Jilin Institute for Food Control, Changchun 130103, China;

2. Jilin Anxin Food Technology Services Limited Company, Changchun 130033, China) ABSTRACT: Objective To determine the lead content in the tea substitutes in Jilin province, and put forward suggestions on the setting of the lead limit standard for local specialty substitute tea. Methods Sixty-nine substitute tea samples were purchased in the markets in Jilin province, and the samples were processed by microwave digestion. The lead contents in the samples were determined by graphite furnace atomic absorption spectrometry(GF-AAS). Results In the

69 tea samples, the positive lead detection rate was 82.6%, and the lead content in all samples was less than 5.0 mg/kg. Conclusion At present, the lead content in different types of tea substitutes in Jilin province is not high, but it is still necessary to revise the lead content limit standard as soon as possible to facilitate quality and safety supervision. KEY WORDS: Jilin province;

tea substitutes;

lead;

standard

1 引言代用茶是指采用除茶以外, 以由国家行政主管部门 公布的可用于食品的植物芽叶、花及花蕾、果(实)、根茎 等为原料, 经加工制作、采用类似茶叶冲泡(浸泡或煮)的 方式, 供人们饮用的产品[1] .代用茶种类丰富, 根据原料 的不同, 产品分为叶类、花类、果(实)类、根茎类和混合 类代用茶. 随着人们对养生保健和个性化的追求, 吉林省代用 茶作为地方特色农副产品越来越受消费者关注, 但由于 工农业的快速发展, 空气、 水、 土壤受到不同程度的污染, 代用茶在种植过程中存在重金属富集, 给消费者健康可 能带来一定威胁, 因此代用茶的质量状况引起了人们的 关注[2-4] . 尽管现行有效的食品安全标准、 有关的行业标准 及食品安全地方标准对代用茶中铅作出了限量要求[1,5-7] , 但存在对同一品种代用茶评价标准不一致及强制标准对代 用茶种类缺少指标限量的情况.总体来说, 代用茶作为"三新"食品, 其重金属污染状况及基础含量水平的调查较为