摘要
建立了食品接触材料中2-甲基-1,3-丙二醇(MPO)和新戊二醇(NPG)迁移量的气相色谱-质谱(GCMS)检测方法。食品接触材料经迁移试验后,所得浸泡液经苯硼酸溶液衍生化、正己烷萃取后,GC-MS测定。结果表明,该方法在优化条件下的线性相关性良好,相关系数(r^(2))大于0.995;MPO和NPG在4%乙酸、10%乙醇、50%乙醇和异辛烷中的检出限均为0.01 mg/L;线性范围均为0.02~0.10 mg/L;在95%乙醇中,MPO的检出限为0.30 mg/L,线性范围为0.50~1.6 mg/L,NPG的检出限为0.03 mg/L,线性范围为0.05~0.16 mg/L。该方法在低、中、高3个浓度水平的平均回收率为85.0%~112%,相对标准偏差(RSD)为0.60%~9.5%。该方法的检测结果准确、灵敏度高,能较好地实现食品接触材料及制品中MPO和NPG迁移量的测定,满足我国法规的限量要求。
A gas chromatography-mass spectrometry(GC-MS)was developed for the determination of migration of 2-methyl-1,3-propanediol(MPO)and 2,2-methyl-1,3-propanediol(NPG)in food contact materials. After the migration test of food contact materials,the obtained soaking solution was firstly derivatized with phenylboric acid solution, then extracted with n-hexane, and finally determined by GC-MS. Results showed that there were good linear relationship of this method in the optimized conditions,with correlation coefficients(r^(2))larger than 0. 995. The detection limits for MPO and NPG in 4%acetic acid, 10%ethanol, 50%ethanol and isooctane were all 0. 01 mg/L within linear ranges of 0. 02-0. 10 mg/L. The detection limit of MPO in 95%ethanol was 0. 30 mg/L within a linear range of 0. 50-1. 6 mg/L. The detection limit for NPG in 95%ethanol was 0. 03 mg/L within a linear range of 0. 05-0. 16 mg/L. The relative standard deviations(RSD)of this method were in the range of 0. 60%-9. 5%,and the average recoveries were 85. 0%-112%. With the high accuracy and sensitivity,the method could be used to determine the migration of 2-methyl-1,3-propanediol and 2,2-methyl-1,3-propanediol in food contact coatings and plastic products, so as to meet the limited requirements of Chinese regulations.
作者
贝荣华
陈湘颖
董犇
钟怀宁
陈燕芬
曾莹
陈胜
李丹
蔡汶静
郑建国
BEI Rong-hua;CHEN Xiang-ying;DONG Ben;ZHONG Huai-ning;CHEN Yan-fen;ZENG Ying;CHEN Sheng;LI Dan;CAI Wen-jing;ZHENG Jian-guo(Guangzhou Customs Technical Center,Guangzhou 510665,China)
出处
《分析测试学报》
CAS
CSCD
北大核心
2021年第11期1657-1662,共6页
Journal of Instrumental Analysis
基金
国家重点研发计划项目(2016YFF0203705)
广州海关科研项目(2021GZCK12,2020GZCK-026)。
作者简介
通讯作者:李丹,研究员,研究方向:食品接触材料检测及安全评估,E-mail:lid@iqtcnet.cn。
