when change a new liner and change a new o-ring and run GC then ms show Diphenyl sulphide
at first suspect this containment from glass wool in liner try change liner and pack glass wool by self with same lot o-ring still ms show Diphenyl sulphide
FYI. before change Liner they use this O-ring another lotno. < Lot 13xx > not show ms Diphenyl sulphide