Mbale zam'matumbo ndi mtundu wa mipanda ya labotale yomwe imagwiritsidwa ntchito pakuwunika kwa mpweya chrometotograss. Amapangidwa kuti azikhala ndi kuchuluka kwa zitsanzo zazing'ono komanso mutu wapamwamba (danga pamwamba pa kusanthula kwa zinthu zosasunthika. Mbalezi nthawi zambiri zimakhala ndi chipewa ndi septum, chomwe chimalola jakisoni wa gasi kapena singano ya sampling. Mbale zamtchire zimagwiritsidwa ntchito posanthula zokongoletsa zachilengedwe (vocs) m'matsanzo osiyanasiyana, monga chilengedwe, mankhwala opangidwa, ndi zitsanzo za chakudya.
Mbale za GC nthawi zambiri zimapangidwa ndi galasi kapena nthawi zina pulasitiki, ndipo zimabwera mosiyanasiyana ndi mawonekedwe ogwiritsira ntchito mavidiyo osiyanasiyana ndi njira zomwe amagwiritsa ntchito. Nthawi zambiri amakhala ndi chipewa ndi septum, chomwe chimalola jakisoni wa sample kapena singano ya zitsanzo.