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Why used FTIR

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. Introduction: The Electromagnetic Spectrum. Increasing Wavelength. 50,000. 12,820. 4000. 400 cm-1. Gamma. X-ray. UV. NIR. IR. FIR. Micro. Radio. 200. 380.

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Why used FTIR

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  1. 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. Introduction: The Electromagnetic Spectrum IncreasingWavelength 50,000 12,820 4000 400 cm-1 Gamma X-ray UV NIR IR FIR Micro Radio 200 380 780 2500 25 000 nm Increasing Energy K-shell electrons Outer-shell electrons Molecular vibrations Molecular Rotation

  3. Infrared (IR) Spectroscopy…. O H H -C-H 2850-2960 cm-1 -C=O 1640-1750 cm-1 =C-H 3020-3100 cm-1 -C-O 1050-1150 cm-1 -C=C- 1650-1670 cm-1 -O-H 3400-3640 cm-1 -C-Cl 600-800 cm-1 -N-H 3310-3500 cm-1 -C-Br 500-600 cm-1 IR Spectroscopy measures the radiation absorbed by materials due to molecular vibrations • Vibration frequencies are influenced by • Atom Size • Environment • Bond Strength ….provides a vast amount of chemical information

  4. 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.

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