基于单颗粒-电感耦合等离子体质谱法评价聚乙烯抗菌食品包装材料中纳米银颗粒的释放  

Evaluation of Release of Nano Silver from Polyethylene Antibacterial Food Packaging Materials via Single Particle Inductively Coupled Plasma Mass Spectrometry

作　　者：梁迪思 梁维新 周启动 杨熙 吴锐 LIANG Di-Si;LIANG Wei-Xin;ZHOU Qi-Dong;YANG Xi;WU Rui(Guangdong Provincial Key Laboratory of Chemical Measurement and Emergency Test Technology,Institute of Analysis,Guangdong Academy of Sciences(China National Analytical Center,Guangzhou),Guangzhou 510070,China;Guangdong Provincial Public Laboratory of Analysis and Testing Technology,Institute of Analysis,Guangdong Academy of Sciences(China National Analytical Center,Guangzhou),Guangzhou 510070,China)

机构地区：[1]广东省科学院测试分析研究所(中国广州分析测试中心),广东省化学测量与应急检测技术重点实验室,广州510070 [2]广东省科学院测试分析研究所(中国广州分析测试中心)广东省分析测试技术公共实验室,广州510070

出　　处：《分析化学》2022年第10期1511-1519,共9页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金项目(No.21777150);广东省重点领域研发计划项目(No.2020B1111350002)资助。

摘　　要：基于单颗粒-电感耦合等离子体质谱法(SP-ICP-MS)研究了4种市售聚乙烯抗菌食品包装材料中纳米银(AgNPs)的释放行为。采用迭代算法对样品中银离子(Ag^(+))和AgNPs信号进行区分,考察了不同的食品模拟介质(水、 10%(V/V)乙醇、 3%(V/V)乙酸)、环境温度和放置时间等条件对银释放量的影响。结果表明,4种抗菌食品包装材料中总银含量为1.5~125.0μg/g;在聚乙烯食品装材料中存在AgNPs和Ag^(+)的释放现象,低温储存可降低银释放量,酸性介质和有机溶剂会促使Ag^(+)释放,对AgNPs无明显影响;AgNPs占总银释放量的0.3%~6.1%,其粒径主要分布在50 nm以下。本研究为食品装材料中纳米颗粒物的释放评价提供了依据和方法。The release of silver nanoparticles(Ag^(+)NPs) in four kinds of polyethylene antibacterial food packaging materials were evaluated via single particle-inductively coupled plasma-mass spectrometry(SP-ICP-MS). The iterative algorithm was used to distinguish the signals produced by nano-silver signal and ionic silver(Ag^(+)) in samples, and the effects of food simulants(ultrapure water, ethanol(10%) and acetic acid(3%)), temperature and storage time on the migration of Ag^(+)NPs and Ag^(+)were investigated. The results showed that the contents of total silver in the four kinds of antibacterial food packaging materials were 1.53-125 μg/g, the release of Ag^(+)and Ag^(+)NPs was found in the four polyethylene food packaging materials, and low temperature conditions could reduce the migration of silver. Acidic media and media with high organic solvent were conducive to the release of Ag^(+)but had no significant effect on Ag^(+)NPs, and the release of Ag^(+)NPs accounted for 0.3%-6.1% of total silver, mainly distributed below 50 nm. This approach provided a method for accurately evaluating the migration of nanoparticles in food packaging materials.

关 键 词：聚乙烯食品包材 纳米银颗粒 单颗粒-电感耦合等离子体质谱法 释放 

分 类 号：TS206.4[轻工技术与工程—食品科学] O657.63[轻工技术与工程—食品科学与工程]