I-gas chromatography. Izici zendlela

I-gas chromatography yindlela yokuhlaziywa eyithole ukuthuthukiswa kwengqondo okuhle kakhulu. Lokhu kuhloswe ngokucophelela kokusungula kwakhe okuyisisekelo futhi okusebenzayo okuye kwanezela ekuthuthukiseni okusheshayo kwale ndlela eminyakeni engamashumi eminyaka yamuva.

Kuyaziwa ukuthi i-gas chromatography ihluke kwezinye izindlela ezifanayo ngoba isebenzisa igesi njengesigaba eselula. Isigaba esimisiwe singaba nesisindo noma esiqinile. Kuye lokhu, omunye ukhuluma ngegesi-adsorption noma gas-liquid chromatography.

Ukuhlukaniswa kwemixube yezinto ezisetshenziswa kumadivayisi afana ne-chromatograph yegesi kungenxa yokuphindaphinda okuphindaphindiwe kokusatshalaliswa kwezingxenye eziphakathi kwesimiso esisimisiwe noma isigaba esiqinile nesigaba esithinta igesi. Inqubo yokuhlukanisa isekelwe emkhakheni wokungabi namandla nokuzenzekelayo izinto ezizohlaziywa. Ingxenye, okungahambisani nokushisa okukhulu ekushiseni okunikeziwe, futhi ukuzithelela kwesigaba esimisiwe kuyinto encane, kuzodlula kukholomu ngokushesha.

Ukusetshenziswa kwegesi njenge-carrier carrier kwenza kube lula ukuthola izinzuzo ezinjengokucaciswa kokuhlukaniswa kwezidakamizwa kanye nesisindo sokuhlaziywa. Isampula yokuhlolwa ifakwa kukholomu efomini elimnandi noma elisephunga. Ngosizo lendlela, kungenzeka ukuba uhlaziye hhayi kuphela amagesi, kodwa futhi nezinto ezinomsoco neziqinile, eziguqulwa zibe yisimo esidingekayo ngokushisa. Kulesi sixhumanisi, ku-gas chromatography, izinga lokushisa lapho inqubo yonke eyenzeka khona idlala indima ebaluleke kakhulu. Imingcele yemingcele yokusebenza ye-gas-adsorption indlela yokuhlaziywa ibanga kusuka ku-70 kuya ku-600 ° C, kanye nokuhlaziywa kwegesi-liquid - kusuka ku-20 kuya ku-400 ° C. Le mboni ikhiqiza i-chromatograph yegesi, evumela ukuthi uhlele ngaphambi kokushisa.

Le ndlela yenza kube lula ukuhlaziya izinto ezinesisindo samangqamuzana ezingaphansi kuka-400. Azinqamuki ekukhuculeni, kodwa angashintshi ukubunjwa kwawo ngesikhathi sokunciphisa okulandelayo.

Ngokuyinhloko, ekusebenzeni kokuhlaziya, igesi-liquid chromatography isetshenziswa. Uma kuqhathaniswa ne-gas adsorption, inezinzuzo ezithile, ezihlotshaniswa ikakhulukazi ngezigaba eziningana zamanzi ezimile, kanye nokuhlanzeka okuphezulu futhi, okubalulekile ngokwanele, nokufaniswa kweziphuzo.

I-gas chromatography iyindlela ecacile, ekhonjiswe ngokunemba okuphakeme, ukuzwela kanye nokwenzeka kokuzenzakalela. Ukungafani nokuguquguquka kwalendlela kunquma idivayisi esetshenziswe kulokhu noma kunjalo. I-gas chromatography, esetshenziselwa ukuhlaziywa okwenziwe ngokweqile, inikeza imiphumela engabonakali engahleleki.

Le ndlela ivumela ukuxazulula izinkinga eziningi zokuhlaziya, ukuhlukanisa nokunquma inani lezinhlanganisela kanye nomncintiswano obuncane ekucindezelekeni komoya. Indlela ye-gas chromatography isetshenziselwa ukuhlanza amalungiselelo amakhemikhali, ukuhlanganiswa kwezixube zibe izingxenye ezihlukene. Isebenza ngokukhethekile ekuhlukaniseni izinto ezifana nokwakhiwa, okuyiklasi elifanayo: ama-acids, ama-alcohols, ama-hydrocarboni.