Ukucoca izitya zikaPetriYinkqubo edinisayo, kodwa le nkqubo ingenza iimvavanyo zisebenze kakuhle. Ukuba isitya se-petri asicocwanga, umvavanyi kufuneka achithe ixesha elininzi ecubungula idatha yovavanyo. Kwaye ukuba isitya se-petri sicociwe kakuhle, umvavanyi angenza uvavanyo ngokufanelekileyo.
Ukucoca izitya zePetri ngesandla:
Ngokubanzi, idlula kumanyathelo amane okumanzisa, ukuhlafuna, ukukha amanzi, kunye nokucoca.
1. Ukumanzisa: Iiglasi ezintsha okanye ezisetyenzisiweyo mazifakwe emanzini kuqala ukuze zithambe kwaye zinyibilikise izihlanganisi. Iiglasi ezintsha mazicocwe ngamanzi empompini ngaphambi kokuba zisetyenziswe, emva koko zifakwe emanzini ubusuku bonke kwi-5% ye-hydrochloric acid; iiglasi ezisetyenzisiweyo zihlala zineproteni eninzi kunye neoyile enamathele kuzo, nto leyo engelula ukuyihlamba emva kokuba yomile, ngoko ke kufuneka ifakwe emanzini acocekileyo emva nje kokusetyenziswa xa kuhlanjululwa.
2. Ukukhuhla: Faka izitya zeglasi ezimanzi emanzini anesepha uze uzikhuhle ngokuphindaphindiweyo ngebrashi ethambileyo. Musa ukushiya indawo efileyo kwaye uthintele umonakalo kumphezulu wezixhobo. Hlamba uze womise izitya zeglasi ezicociweyo ukuze zicolwe.
3. Ukucola: Ukucola kukuntywilisela izixhobo ezikhankanyiweyo apha ngasentla kwisisombululo sokucoca, esaziwa ngokuba sisisombululo se-asidi, ukususa izinto eziseleyo ezinokubakho phezu kwezixhobo ngokusebenzisa i-oxidation enamandla yesisombululo se-asidi. Ukucola akufuneki kube ngaphantsi kweeyure ezintandathu, ngesiqhelo ubusuku bonke okanye ngaphezulu. Lumka ngezixhobo.
4. Hlamba: Izitya emva kokuzihlamba nokuzicola mazihlanjwe ngokupheleleyo ngamanzi. Nokuba izitya zihlanjwe zicocekile na emva kokuzicola zichaphazela ngqo impumelelo okanye ukungaphumeleli kwenkcubeko yeseli. Hlamba izitya ngesandla emva kokuzicola, kwaye isitsha ngasinye kufuneka siphindaphindwe “sizaliswe ngamanzi-singenanto” ubuncinane izihlandlo ezili-15, kwaye ekugqibeleni sifakwe emanzini axutyiweyo kabini kangangezihlandlo ezi-2-3, zomiswe okanye zomiswe, kwaye zipakishwe ukuze zisetyenziswe kamva.

Indlela yokucoca yokusebenzisa i-XPZumatshini wokuhlamba iiglasi zelebhuukucoca isitya sepetri:
Ubungakanani bokucoca: Izitya ze-petri ezili-168 zinokucocwa ngebhetshi enye
Ixesha lokucoca: imizuzu engama-40 ukugqiba ukucoca
Inkqubo yokucoca: 1. Beka isitya sepetri esiza kucocwa (esitsha singafakwa ngqo kwisixhobo sokuhlamba iibhotile, kwaye isitya sepetri esinesisixhobo sokucoca kufuneka sithulule inxalenye enkulu yesisixhobo sokucoca iibhotile kangangoko kunokwenzeka) kwingobozi efanayo yesisixhobo sokuhlamba iibhotile. Umaleko omnye ungacoca izitya zepetri ezingama-56, kwaye kube kanye ungacoca izitya zepetri ezili-168 ezinezitezi ezintathu.
2. Vala ucango lomatshini wokuhlamba iibhotile, khetha inkqubo yokucoca, kwaye umatshini uya kuqala ukucoca ngokuzenzekelayo. Inkqubo yokucoca ibandakanya ukucoca kwangaphambili – ukuhlamba okuphambili kwe-alkali – ukuthomalalisa i-asidi – ukuhlamba ngamanzi acocekileyo.
3. Emva kokucoca, ucango lomatshini wokuhlamba iibhotile luvuleka ngokuzenzekelayo, lukhuphe isitya esicociweyo sokucoca, luze lufudukele kwizixhobo zokubulala iintsholongwane ukuze kubulawe iintsholongwane.
Ukucocwa kwezitya zepetri kwiilabhoratri zebhayoloji yinxalenye ebaluleke kakhulu yolawulo lwelabhoratri. Ukusebenzisa umatshini wokuhlamba iibhotile ozenzekelayo endaweni yokucoca ngesandla kunokuthintela ukungcoliswa okunqamlezileyo ekuchaphazeleni idatha yovavanyo, kukhusele impilo yabasebenzi bovavanyo, kwaye kuphucule ukusebenza kakuhle kovavanyo.