二、傅里叶红外光谱仪（FTIR) 的优点

a.快速性：

FTIR控制所有样板及采集试验数据，并通过实时处理所产生大量数据。在瞬间内可同时掌握整个红外区扫描结果, 及极小地捕捉未知化合物信息。这搜集范围, 及即时方向转换操作之块速度, 均比传统红外光谱仪快5~30倍不等。

b. 灵敏性：

FTIR精确而又高度灵敏的探测系统，它可匹配各式应用验功需求，由于所有测试资料即刻转化为数字信号进行分析处理，结果数据适合再模拟操作并迅速得到答案。如在生物组织或者水果蔬菜、饮食内容分析上皆有相当卓越 的表现。

c. 对样品的侵入性小：

傅里叶变换红外光谱技术因测试及操作方面对真实厚度分布性抗扰之程度较佳, 故具优良对固态、液态或氣态样本之非破坏识别能力；而其一般标准的取样方法, 亦无需考虑太过严苛的状态与规格。

总结

Red light and Fourier infrared spectroscopy are two different methods used to examine the properties of matter. IR spectroscopy is based on the absorption or transmission of energy when a molecule vibrates after absorbing electromagnetic radiation with wavelengths between 0.78 and 1000 microns in length; this technique can identify which compounds are present in a sample. The Fourier transform, on the other hand, is a mathematical tool that can be applied to almost all disciplines and involves expanding a function into different sine and cosine functions of various frequencies or approximating it through integration. FTIR spectroscopy uses this technique to obtain data from spectra produced by IR radiation absorption or reflection; because of its rapidity, sensitivity, and non-invasive nature (amongst other factors), it has become an increasingly popular analytical tool across many industries.

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