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Peptides MEX

Peptides MEX / Glossary

Retention time: measuring and comparing a peak

Retention time belongs to a component under the conditions of a particular separation.

Updated · Sources and editorial standards

From sample introduction to the peak maximum

Total retention time runs from sample introduction to the appearance of the component’s peak maximum. It includes the passage time of an unretained species. It is not necessarily the duration of the entire chromatographic run.

Sources: [1][2]

Total versus adjusted time

Adjusted retention time subtracts the passage time of an unretained species. Values from tables using different conventions are not directly comparable. Retain the method as well: a time match without context does not provide complete identification by itself.

Sources: [1][2]

Questions about this reference

Is adjusted retention time identical to total retention time?

No. Adjusted time subtracts the passage time of an unretained species.

[1][2]

Sources and original reading

  1. IUPAC Gold Book: total retention time
  2. IUPAC Gold Book: adjusted retention time

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