What is the reason that my standard and blank having the same peaks in GC for a PHB calibration curve ?

hi evrybody, I am using the internal standard technique for building a calibration curve for PHB((Polyhydroxybutyrate).My internal standard is benzoic acid.Before GC, I used 2ml 2 mg /mL PHB（in...

28 March 2021 9,100 2 View