• 本文目录导读：
• 1、一、傅立叶变换红外光谱方法
• 2、二、傅立叶变换红外光谱仪的特点

一、傅立叶变换红外光谱方法

1. 基本原理

傅立叶变换红外光谱法（Fourier Transform Infrared Spectroscopy，简称FTIR）是一种利用物质分子振动引起的吸收或发射的能量所进行的结构分析和定量测定化学成分和它们组成中元素等信息的手段。

Infrared radiation is absorbed by the covalent bonds of a molecule causing it to vibrate in several different modes. FT-IR spectrometers measure the intensity and frequency of these vibrations allowing an IR spectrum to be obtained. The resulting infrared spectrum can be used to identify unknown compounds or determine functional groups present within a sample.

2. 优势与应用领域

1. 样品易制备，使用方便，检测结果准确；
2. 对于小样品体积也有很高灵敏度；
3. 广泛适用于有机化合物、无机物质、生物大分子等复杂混合液体或固体样品检测；
4. 常规药剂学研究、食品质量监督、分析化学等领域的科研工作者使用

二、傅立叶变换红外光谱仪的特点

1. 优势：

• 高精度和灵敏度；
• 数字技术控制，获得更稳定可靠数据，并且较易于自动化测量和结果处理；
• 采用单色仪进行分束，具有良好的信号干扰抑制能力。

2. 构成要素与功能描述:

一个FTIR系统由以下几个主要组成部分：Fourier变换仪器（包括运动元件）、样品室及相关检测设备（如检测卡台）及计算机等。

• The Fourier Transform Instrument (FTI):

The FTI is the optical system which makes use of Michelson interferometer to produce an interference pattern from IR radiation passing through a sample and then separated into two beams, one being directed through the sample while the other beam passes around it.

< li >< em >< b > The Sample Chamber and Related Detection Equipment

< p >The sample chamber is where samples are placed for their analysis via FTIR spectroscopy. It includes accessories like cells, holders, and plates. The detection equipment includes detectors that measure the intensity of IR radiation through a sample as a function of wavelength.

• The Computer:

FTIR spectrometers come with built-in software to acquire and analyze data obtained from spectra.

总之，傅立叶变换红外光谱技术的不断发展和完善，使其在分子结构研究、质量监控及缺陷检测等领域具有广泛应用前景。

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