不同产地蜜蜡及合成树脂的红外光谱和成分研究

Study on infrared spectrum and composition of beeswax and synthetic resin from different areas

市面上蜜蜡产地主要为波罗的海、缅甸,近年来出现一种外观似天然蜜蜡的合成树脂。本研究使用傅里叶变换红外光谱仪及Elementar vario cube元素分析仪测量了缅甸、波罗的海蜜蜡和合成树脂,分析其红外光谱差异及C、H、N、S元素含量差异,结果表明:缅甸蜜蜡的特征红外吸收在1223cm^(-1),波罗的海蜜蜡则是1258cm^(-1)附近宽而缓的吸收肩峰与1155cm^(-1)的尖峰,合成树脂则显示多种有机吸收峰,与天然蜜蜡明显不同。合成树脂N含量高于天然蜜蜡,C和H含量低于天然蜜蜡。缅甸蜜蜡、波罗的海蜜蜡及合成树脂的C、O质量分数和C、H质量分数具有很好的分区性及相关性,从化学成分上解决了产地和仿制品鉴别难点。

Myanmar,Baltic beeswax and synthetic resin were detected by Fourier transform infrared spectrometer and Elementar vario cube elemental analyzer.The differences of infrared spectrum and the contents of C,H,N,S element were analyzed.The experimental results showed that the characteristic infrared absorption of Myanmar beeswax amber was at 1223cm^(-1),that of Baltic beeswax amber had broad and gentle absorption shoulders and peaked at 1155cm^(-1) around 1258cm^(-1),that of synthetic resins showed a variety of organic absorption peaks,which were obviously different from natural beeswax.The content of N in synthetic resin was higher than that in natural beeswax,while the content of C and H in synthetic resin was lower than that in natural beeswax.The C,O mass fractions and C,H mass fractions of Myanmar beeswax,Baltic beeswax,and synthetic resins had good partitioning and correlation,which solved the difficulties in identifying the origin and imitation products from the perspective of chemical composition.