Retention Time Average For Standards with different Labels

JDG
JDG
in Software Products
Hi!

is there a way i would be able to create a custom field to get the average of the Retention Times for all the standards injected throughout the run with different Labels?

for example
Control (C1)
Standard (S1) which has 5 consecutive injections
Sample
Sample
Sample
Standard (S)

I am inputting S%.%.%.AVE(Retention Time) but it would only give me the average of the bracketing standard. if I input S1.%.%.AVE(Retention Time) it would give me only the average of the consecutives. how can i get them all accounted for?

Thanks!

Answers

  • Empower2019
    Empower2019
    You could use the report method for this and use a suitable filter criteria such as a peaks table with data filtering condition of Sample Type =Standard. Then add Mean to the retention time column properties.

    If you need a custom field for this you just alter the formula to %.%..AVE(Retention Time) and change the Sample Type to Standards Only. 
  • JDG
    JDG
    Thanks Empower2019, 

    I tried inputting the custom field as %.%..AVE(Retention Time) like you stated and changed the Sample Type to Standards only, but I would want the AVE of the standards to show up in the samples that way I would be able to create a custom field to calculate the % RT difference between the sample injection and the average of the Standards. Unless there is an easier way to create a custom field for that specifically? I appreciate any insight

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