Is it possible to calculate RRT (Relative Retention Times) in Clarity?

Yes, from Clarity ver. 3.0 you can add a User Column which display RRT according to a Compound Name. To do this, follow the instructions:

  • In the Chromatogram, you need a defined peak name from Calibration Table which will be used for calculation of other peaks RRT. Alternatively you can name a peak directly in the chromatogram by using the Force Peak Name function.
  • In the Result Table of the Chromatogram window, add new User Column and in the Expression field, add [Reten. Time]/[COMPOUNDNAME$Reten. Time], where COMPOUNDNAME is the Compound which will be used as reference peak to calculate the retention times. You can generate the calculation by choosing the Reten. Time in the Columns field, then the "/" sign, and for last, click the Special Values button and click on the Compound item. Type name of the column in the Title field and hit OK. New column appear in the Result Table containing the calculated RRT. See the image below.

rrt calculation

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Last updated: 2018-08-02 | webmaster