I have to quantify caprylyl glycol (1,2-octanediol) in cosmetics samples (emulsion) by GC/FID.
Calibration : I made dilutions of the caprylyl glycol in water.
Samples : Dilutions are more difficulted because of the sample matrix.
I tried to make my dilutions in water and I used a filter but I'm not sure if all the caprylyl glycol is in my sample.
Do you have idea?