Okwangoku, iilabhoratri ezininzi zixhotyiswe ngezixhobo zokuchonga eziphambili, ezifana ne:LC-MS, GC-MS, ICP-MS, njl. Ukuchaneka kwezi zixhobo zokuchonga kuphezulu kakhulu, okunokufikelela kwinqanaba le-PPM okanye le-PPB. Kwangaxeshanye, ukusebenza kakuhle kokufumanisa kuphuculwe kakhulu. Kukho izixhobo ezichanekileyo ngakumbi neziphezulu ekufuneka zisetyenziswe ngabasebenzi belabhoratri, kwaye isampuli enzima nenzima yonyango lwangaphambi kokuba kusetyenziswe ichitha ixesha elininzi elisebenzayo labasebenzi belabhoratri.
Nangona kunjalo, ukucoca ngesandla kwezi zixhobo zovavanyo kukuchitha ixesha elininzi, nto leyo ethintela ukuphuculwa kokusebenza kakuhle kovavanyo. Abavavanyi banxibelelana ngokuthe ngqo neekhemikhali ezahlukeneyo zokucoca, ezifana ne-asidi enamandla, i-alkali enamandla, i-chromic acid, njl. Kukho ithuba lokwenzakala kunye nokulimala emzimbeni kwimpilo yomvavanyi. Ingakumbi umonakalo we-Hexavalent chromium emzimbeni awunakuguqulwa. Ukucoca ngesandla akukahlangabezani neemfuno ezisemgangathweni zelebhu zanamhlanje ezifana nokulinganisa, ukurekhodwa kwedatha kunye nokulandeleka.
Ezi kunye nezinye iingxaki zisinyanzele ukuba siphuhlise izixhobo ezifanaumatshini wokuhlamba iibhotile zelebhuNgokusekelwe kumava okusebenzisa, ingazisombulula kakuhle ezi ngxaki zingasentla, kwaye inokuba nefuthe elihle kakhulu ekuphuculweni ngokubanzi kwelebhu.Isicoci seglasi selebhuIkakhulu yenziwe ngenkqubo yokuhlamba, inkqubo yokucoca, inkqubo yokucoca kunye nesekethe yokulawula. Ingaqhagamshelwa kwiintlobo ezintathu zemithombo yamanzi, ebandayo, eshushu kunye neyomileyo, ukucoca nokubulala iintsholongwane kwizixhobo zelebhu. Isakhiwo siphela senziwe ngentsimbi engagqwaliyo, iqokobhe langaphandle lenziwe ngentsimbi engagqwaliyo engama-304 kwaye ikhabhinethi yangaphakathi yenziwe ngentsimbi engagqwaliyo engama-316, enokumelana nokugqwala okuhle; ukusebenza kweqhosha langaphambili kulula kwaye konga amandla, kwaye inkangeleko yentsimbi engagqwali ecwangcisiweyo intle kwaye intle.
Ezi zixhobo zinomsebenzi wokucoca ngokuzenzekelayo, olungele kakhulu ukucoca nokubulala iintsholongwane, kwaye zinokugcina umatshini kunye nezinto zokucoca zicocekile kwaye zicocekile kakhulu. Zifanelekile kwizixhobo zelebhu ezifana ne-baster, ityhubhu yovavanyo, isilinda yokulinganisa, iflaski yekhonikhi, ipayipi, njl. kwaye zinokuxhotyiswa ngeerakhi zokucoca ezifunekayo ngokweemfuno zabathengi. Ukucoca isitshizi kunokwenzeka; ucango lokhuseleko lokutsala ngaphambili luphucula ukusebenziseka lula. I-nozzle ejikelezayo yohlobo lweshawa ekwinxalenye ephezulu yekhabini yenzelwe ngaphandle kweziphelo ezifileyo, ezinokucoca ngokulinganayo zonke iintlobo zezixhobo. Iseti nganye yeerakhi zokubulala iintsholongwane ixhotyiswe ngeekholamu zokutshiza ngamanzi (iziqwenga ezili-16-32 zingabekwa) ukuze ulwelo lokucoca lukwazi ukutshizwa ngqo kwisikhongozeli ukuze luhlanjwe.
Ngamafutshane, ngumkhwa oqhelekileyo wokuba iilabhoratri ezininzi zikhetha ukuxhotyiswa ngoomatshini bokuhlamba iibhotile zelebhu, nto leyo engongi nje ixesha neendleko, kodwa ikwaqinisekisa ngcono iziphumo zovavanyo. Yeyona nto ilungileyo kuzo zombini ezi hlabathi.