CAJ | 학술논문

[目的]用太赫兹时域光谱技术(THz-TDS)研究三聚氰胺的波谱特征,以鉴别乳品中是否添加三聚氰胺.[方法]采用THz-TDS技术测量了室温下三聚氰胺和三聚氰酸在0.3～2.5 THz 的吸收谱和折射率谱.[结果]2种样品在0.3～2.5 THz波段各有明显的特征吸收峰,三聚氰胺在1.98和2.24 THz,三聚氰酸在1.27和2.37 THz,这是用THz-TDS技术进行鉴别的基础.密度泛函理论计算和晶体数据表明,2种样品的THz 吸收光谱主要来源于分子间的与氢键相关的集体振动模式.三聚氰胺在该波段的吸收谱,可用于奶粉中不同含量三聚氰胺的定量分析,也可用于研究三聚氰胺和三聚氰酸形成的1∶ 1网状结构.[结论]太赫兹光谱不仅是鉴别三聚氰胺与三聚氰酸的有效手段,而且为研究它们之间的复合物结构提供了新的思路.
[목적]용태혁자시역광보기술(THz-TDS)연구삼취청알적파보특정,이감별유품중시부첨가삼취청알.[방법]채용THz-TDS기술측량료실온하삼취청알화삼취청산재0.3～2.5 THz 적흡수보화절사솔보.[결과]2충양품재0.3～2.5 THz파단각유명현적특정흡수봉,삼취청알재1.98화2.24 THz,삼취청산재1.27화2.37 THz,저시용THz-TDS기술진행감별적기출.밀도범함이론계산화정체수거표명,2충양품적THz 흡수광보주요래원우분자간적여경건상관적집체진동모식.삼취청알재해파단적흡수보,가용우내분중불동함량삼취청알적정량분석,야가용우연구삼취청알화삼취청산형성적1∶ 1망상결구.[결론]태혁자광보불부시감별삼취청알여삼취청산적유효수단,이차위연구타문지간적복합물결구제공료신적사로.
[ Objective] Spectroscopic character of melamine was investigated with Terahertz time-domain spectroscopy in order to identify mel-amine in dairy. [ Method]The spectra of absorption and refractive index of melamine and cyanuric acid at 0. 3 -2. 5 THz were measured in room temperature by using THz-TDS technology. [Result]The each of two samples had obvious characteristic absorption peak at wave band of 0.3 -2.5 THz,the melamine had absorption peaks at 1.98 and 2.24 THz and cyanuric acid at 1.27 and 2.37 THz,which was the foundation for identification with THz-TDS technology. The Density Functional Theory (DFT) calculation and crystal data showed, the THz absorption spectra of 2 samples were mainly come from collective vibration modes related with hydrogen bonds between molecules. The absorption spectrum of melamine at this wave band could be used for quantitative analysis of melamine with different contents in milk powder,and also could be used for study on 1:1 reticular structure formed by melamine and cyanuric acid. [ Conclusion ] THz-TDS was not only the effective means of identification of melamine and cyanuric acid, but also supplied a new thought for research of the complex structure between them.