July 2012
Intermediate to advanced
758 pages
17h 12m
English
Content preview from Pharmaceutical AnalysisBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
Start your free trial
Chapter 2
Infrared Spectrophotometry
INTRODUCTION
It is defined as the measurement and interpretation of the absorbed infrared radiation. This method is mainly used for the identification of chemical substances. The absorption is mainly based on the vibrations of the chemical substances after absorption of the infrared radiation.
The spectrum bands present in the IR spectrum represent the functional groups and bonds present in the chemical substance. Hence, the IR spectrum is commonly known as the finger print of the chemical substance.
The IR region is in between 0.8 and 1,000 μm. Then these regions are again classified into three subclasses. They are as follows:
- Near infrared region: 0.8-2.5 μm or 12,500–4,000 cm−1.
- Middle infrared region: ...