I am trying to create method for vinly chloride in MeOH (GC-FID) and i did it but disturbing is that with every next inj peak area of VC is lower (on the same method's parameters).
First inj area is about 200, next 180, next 150... FOR THE SAME CONCENTRATION.
Method is short - it has only about 4,5 min. I know that VC is volatile but maybe is also another reason? Have anybody any solution for that problem? :)