返青箬叶中铜和锌在不同食品模拟物中迁移情况  

Migration of Copper and Zinc of Regreen Indocalamus Leaves in Different Food Simulants

作　　者：刘立萍 沈宏桂 罗宏泉 王宁[1] 唐序文 钦石银 LIU Li-ping;SHEN Hong-gui;LUO Hong-quan;WANG Ning;TANG Xu-wen;QIN Shi-yin(Institute of Food and Medicine Quality Inspection,Huaihua 418000,China;Institute of Product and Commodity Quality Inspection and Supervision,Huaihua 418000,China;Inspection and Testing Center of Agricultural Products Quality,Huaihua 418000,China)

机构地区：[1]怀化市食品药品检验所,湖南怀化418000 [2]怀化市产商品质量监督检验所,湖南怀化418000 [3]怀化市农产品质量检验检测中心,湖南怀化418000

出　　处：《包装工程》2021年第21期72-78,共7页Packaging Engineering

基　　金：湖南省市场监督管理局科技计划(2020KJJH69)。

摘　　要：目的分析研究返青箬叶中铜和锌在不同食品模拟物中的迁移情况,为食品包装用箬叶的质量安全控制提供理论依据。方法称取6份25 g返青箬叶,分别置于6种食品模拟物中,在100℃下保温24 h,用微波消解-火焰原子吸收光谱法测定食品模拟物处理前后的返青箬叶中铜或锌的含量,计算其迁移量,分析迁移情况。结果返青箬叶中的铜和锌在碱性缓冲溶液(pH=10.14)中均未发现迁移,在其他5种食品模拟物中发生不同程度的迁移。铜在大豆油中迁移量最大(4.7 mg/L);锌在4%(体积分数)乙酸溶液中迁移量最大(17.5 mg/L)。结论返青箬叶中铜和锌在碱性食品模拟物中未发现迁移,在其他食品模拟物中发生明显迁移,用返青箬叶包裹的食品存在食品安全风险。基于此研究结果和我国目前没有标准对天然食品包装材料保绿化合物来源和迁移限量作明确规定的情况下,应当禁止返青箬叶用作食品包装材料。The work aims to analyze and study the migration of copper and zinc of regreen indocalamus leaves in different food stimulants,so as to provide a theoretical basis for the quality and safety control of indocalamus leaves used for food packaging.Six portions of 25 g of indocalamus leaves were taken and placed in six food simulants respectively,and then heated at 100℃for 24 hours.The concentrations of copper and zinc in regreen indocalamus leaves were measured by microwave digestion-Flame Atomic Absorption Spectrometry(AAS)to evaluate the migration in food simulants before and after treatment.Finally,the migration amount was calculated and the migration situation was analyzed.Neither copper nor zinc in regreen indocalamus leaves migrated in alkaline buffer solution(pH 10.14),but both of them migrated in varying degrees in other 5 food simulants.Copper migrated with maximum amount in soybean oil by 4.7 mg/L,and zinc migrated with maximum amount in 4%acetic acid solution by 17.5 mg/L.Neither copper nor zinc in regreen indocalamus leaves migrate in alkaline buffer solution,but both of them migrate in varying degrees in other 5 food simulants. There is a food safety risk in the food wrapped with regreen indocalamus leaves. Based on the study results andthe fact that there is no standard for the source and migration limits of green compounds in natural food packaging materialsin China, it should be prohibited to use regreen indocalamus leaves as food packaging materials.

关 键 词：返青箬叶 铜和锌 食品模拟物 迁移 原子吸收火焰光度法 

分 类 号：TS206.4[轻工技术与工程—食品科学]