Chromatography

Qualitative Methods of GC/MS Analysis

  Retention Time and Retention Index

The retention time and the retention index are important parameters in qualitative analysis. These retention parameters will be explained here.

• Chromatographic Separation
• Distribution Coefficient
• Retention Time Parameters
• Factors Affecting Retention Time
• Qualitative Analysis by GC
• Relative Retention
• Retention Index (Isothermal)
• Linear Retention Index (LRI)
• Identification Using LRI

  Library Search

The mass spectra show a specific pattern corresponding to compounds. Therefore, the comparison of a measured spectrum to a database is an effective identification method. Library search will be explained here.

• An Easy Tool for Identification
• Searching Libraries
• Search Methods of Libraries
• Combined Use of Retention Index
• Examples of Spectral Library

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