Chart Recorder

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Description
Preparing to Use a Chart Recorder
Recording Data
Calculating The Retention Time
Additional Topics
Common Problems
Self Check Exercises
Related Modules
Gas Chromatography
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Calculating the Retention Time

 

The retention time is calculated according to the following equation:

check What is the retention time for Peaks A and B below if the chart speed was 2 cm/s?

Answer

The center of peak A is at approximately 6.5 cm. Thus, the calculation is 6.5 cm/2cm/s = 3.25 s = 3 s.

The center of peak B is at approximately 13.5 cm. Thus, the calculation is 13.5 cm/2 cm/s = 6.75 s = 7 s.