太赫兹时域光谱(THz-TDS)技术对物质进行无损检测是太赫兹应用领域的一个研究热点。 针对近日报道检查出部分麦当劳的“麦乐鸡”添加剂中含有的一种化学成分——特丁基对苯二酚(TBHQ)含量超标, 应用太赫兹无损检测技术对其作定性识别。 测得该种化学成分在0.2～2.2 THz的吸收谱和折射率曲线, 并将其以不同比例与面粉均匀混合, 测得混和物和面粉在0.2～2.2 THz的吸收谱。 同时对TBHQ进行理论模拟作为对比。 结果表明, 通过太赫兹波段吸收曲线的特征差异检测TBHQ是可行的, 为无损食品添加剂的检测提供一种新型的方法。

Terahertz time-domain spectroscopy (THz-TDS) technique has a wide range of applications in nondestructive testing. After many years study, people have found that many materials have characteristic absorptions in terahertz range. This letter studies the THz spectra of tert-butylhydroquinone (TBHQ), a food additive that was reported excessively in Mak chicken of McDonald. The authors applied terahertz nondestructive testing technique in identifying this material, testing the absorption and refractive index. The absorption spectra of TBHQ and flour mixture in 0.2~2.2 THz were also investigated. The simulation of vibration for single molecular was undertaken. The results represent that this method is possible by comparing the difference in absorption lines and this method paves the way for detecting food additives.