ATR-IR和固体NMR法分析鉴别仿瓷餐具的材质  

Component analysis and identification of melamine dishware by ATR-IR and NMR

作　　者：张巍[1,2] 高峡[1,2] 王朝晖[1] 张经华[3] 

机构地区：[1]国家食品质量安全监督检验中心 [2]北京市理化分析测试中心北京 100089 [3]北京市理化分析测试中心

出　　处：《现代仪器》2010年第3期39-41,共3页Modern Instruments

基　　金：国家质量监督检验检疫总局"十一五"质检公益项目2007GYJ034;北京市科学技术研究院创新团队计划支持项目IG200801N/C2

摘　　要：目前,市场上存在着用脲醛树脂代替密胺树脂为原料生产的仿瓷餐具。为有效地鉴别这2种不同原料的制品,本文采用衰减全反射红外(ATR-IR)和固体核磁共振(S-^(13)CNMR)方法,分析市售的仿瓷餐具。ATR-IR实验结果表明:810 cm^(-1)处为密胺餐具的特征峰,1630 cm^(-1)处为脲醛餐具的特征峰。同时,S-^(13)C NMR实验表明:δ_C159为脲醛中羰基的特征化学位移,δ_C166为密胺的氮杂环上碳的特征化学位移。2种方法均可以有效地对仿瓷餐具的材质进行分析鉴别,但前者实用性更强。Recently, some fakes appeared in the melamine dishware market, because the melamine-formaldehyde resin （MF） was replaced partly by urea-formaldehyde resin （UF） in manufacture process. For effective identifica- tion of different products, ATR-IR and NMR were used to analyze dishware purchased from local market. The experiment results showed that ATR-IR analysis indicated that 810cm-1 is the characteristic absorption of MF dishware, and 1630 cm-1 is the UF dishware. Also, 13C NMR indicated that δc166 is the characteristic peak of MF dishware, and δc1 59 is the UF dishware. Both ATR-IR and NMR methods can analyze and identify the component of MF and UF dishware, but the former is more practical and convenient for application.

关 键 词：仿瓷餐具 衰减全反射红外法 固体核磁共振法 化学位移 

分 类 号：O643.36[理学—物理化学]