1. 11 Why used FTIR 非破壞性分析, 操作簡單, 分析快速 樣品直接分析, 幾乎勿需前處理 配合資料庫搜尋, 可作未知物分析 可利用化學官能基強度或光譜特性變化, 來做定量分析 無需化學試劑, 無環境污染問題, 安全無污染

2. 22 Introduction: The Electromagnetic Spectrum Increasing Energy RadioMicroFIR IRNIRUVX-rayGamma 4000400 cm-112,82050,000 25 000 nm2500780380200 Increasing Wavelength K-shell electrons Outer-shell electrons Molecular vibrations Molecular Rotation

3. 33 Infrared (IR) Spectroscopy …. -C-H2850-2960 cm -1 -C=O1640-1750 cm -1 =C-H3020-3100 cm -1 -C-O1050-1150 cm -1 -C=C-1650-1670 cm -1 -O-H3400-3640 cm -1 -C-Cl600-800 cm -1 -N-H3310-3500 cm -1 -C-Br500-600 cm -1 Vibration frequencies are influenced by Atom Size Environment Bond Strength O H H ….provides a vast amount of chemical information IR Spectroscopy measures the radiation absorbed by materials due to molecular vibrations

4. 44 Why Use Infrared Spectroscopy? Fourier Transform InfraRed (FT-IR) spectroscopy is an extremely powerful technique for identifying the molecular composition of many organic and inorganic materials. When analysed by infrared spectroscopy, materials produce a spectrum or fingerprint.