I-Vials ye-Propace luhlobo lwee-vials zelebhu ezisetyenziselwa uhlalutyo lwe-chromatography. Ziyilelwe ukuba ziqulathe ivolumu encinci yesampulu kunye nepokophu (isithuba esingaphezulu kwesampulu) yohlalutyo lweendlela zokuhlaziya. Ezi vils zihlala zinesikhafu se-screw ene-septum, evumela ukuba inaliti yegesi okanye inaliti yesampulu. I-vials ye-ERECE isetyenziselwa ukuhlalutya imilinganiselo ye-orlating ye-orgaike (VOCs) kwiisampulu ezahlukeneyo, ezinje ngokusingqongileyo, amayeza, kunye neesampulu zokutya.
I-vials ze-GC ziqhele okwenziwa ngeglasi okanye ngamanye amaxesha iplasitiki, kwaye ziza ngobukhulu obahlukeneyo kunye nemilo yokuhlala iisandi ezahlukeneyo zesampulu kunye neendlela zokwenza intsholongwane. Bahlala benesikhafu se-screw cap ene-septum, evumela inaliti yesampulu okanye inaliti yesampulu.