SPME tana da asali guda ukuhakarhalaye: Kai tsaye Ectraction SPME, Headspace SPME da membrane-kare SPME.

1) Hakar kai tsaye

A cikin hanyar hakar kai tsaye, fiber quartz mai rufi tare dahakarAn saka lokaci na tsaye kai tsaye a cikin matrix samfurin, kuma ana canza abubuwan da aka yi niyya kai tsaye daga matrix samfurin zuwa lokacin tsayuwar hakar.A yayin ayyukan dakin gwaje-gwaje, ana amfani da hanyoyin tashin hankali don haɓaka yaɗuwar abubuwan nazari daga matrix ɗin samfurin zuwa ƙarshen lokacin tsayuwar hakar.Don samfuran iskar gas, iskar gas ɗin iskar gas ɗin ya isa don haɓaka ma'auni na abubuwan nazari tsakanin matakan biyu.Amma ga samfuran ruwa, saurin yaduwa na abubuwan da ke cikin ruwa shine umarni 3-4 na girma ƙasa da na iskar gas, don haka ana buƙatar fasahar hadawa mai inganci don cimma saurin yaduwar abubuwan da ke cikin samfurin.The more amfani hadawa dabaru hada da: speeding sama da samfurin kwarara kudi, girgiza da hakar fiber shugaban ko samfurin ganga, na'ura mai juyi stirring da duban dan tayi.

A gefe guda, waɗannan fasahohin haɗawa suna haɓaka ƙimar yaduwa na abubuwan da ke cikin babban matrix samfuri, kuma a gefe guda, rage abin da ake kira "yankin asarar" wanda ke haifar da Layer na fim ɗin kariya na ruwa wanda aka kafa akan. bangon waje na lokacin tsayayyen hakar.

2) Cire sararin samaniya

A cikin yanayin hakar sararin samaniya, ana iya raba tsarin hakar zuwa matakai biyu:
1. Abun da aka bincika yana yaduwa kuma ya shiga daga lokaci na ruwa zuwa lokacin gas;
2. An canza sashin da aka bincika daga lokacin gas zuwa lokacin tsayayyen hakar.
Wannan gyare-gyaren zai iya hana lokacin cirewa daga gurɓatar da manyan kwayoyin halitta da abubuwa marasa ƙarfi a cikin wasu samfuran matrices (kamar ɓoyewar ɗan adam ko fitsari).A cikin wannan tsari na hakar, saurin cirewar mataki na 2 gabaɗaya ya fi saurin yaɗuwar mataki na 1, don haka mataki na 1 ya zama matakin sarrafawa na hakar.Don haka, abubuwan da ba za su iya canzawa ba suna da saurin hakowa fiye da abubuwan da ba su da ƙarfi.A haƙiƙa, don abubuwan da ba su da ƙarfi, ƙarƙashin yanayin haɗaɗɗen samfurin iri ɗaya, daidaiton lokacin hakar sararin sama ya fi guntu fiye da na hakar kai tsaye.

3) Cire kariyar gabobin jiki

Babban manufar kariyar membrane SPME shine don karehakarlokaci na tsaye daga lalacewa lokacin da ake nazarin samfuran ƙazanta sosai.Idan aka kwatanta da hakar sararin samaniya na SPME, wannan hanyar ta fi fa'ida don haɓakawa da haɓaka abubuwan da ba su da ƙarfi.Bugu da ƙari, fim ɗin kariya da aka yi da kayan aiki na musamman yana ba da wani zaɓi na zaɓi don tsarin cirewa.