I'm reviewing lab results for VOCs by 8260B and had a high recovery for the surrogate a,a,a-Trifluorotoluene. This is the first time i've seen this surrogate used for 8260 and I'm somewhat at a loss for its analyte associations; particularly because they also used Bromofluorobenzene and Toluene-d8. Are there any specific analytes a,a,a-Trifluorotoluene is used for? I can include an analyte list if it would be helpful.

Thanks in advance!