Joaloka rasaense oa laboratori, e 'ngoe ea lisebelisoa tsa bohlokoahali tseo u tla li hloka ke meter ea pH. Sesebelisoa sena se bohlokoa ho netefatsa hore u fumana liphetho tse nepahetseng tsa tlhahlobo ea lik'hemik'hale. Sehloohong sena, re tla tšohla hore na pH meter ke eng, e sebetsa joang, le bohlokoa ba eona tlhahlobong ea laboratori.
pH Meter ke eng?
PH meter ke sesebelisoa sa elektroniki se sebelisetsoang ho lekanya pH (acidity kapa alkalinity) ea tharollo. E na le probe e kenngoa ka tharollo e ntseng e lekoa, 'me sesebelisoa se lekanya bokhoni ba motlakase pakeng tsa probe le electrode ea referense. Bokhoni bona bo fetoha ho baloa pH.
pH Meter e sebetsa Joang?
Methara ea pH e sebetsa ho latela molao-motheo oa electrochemistry. Sehlahisoa sena se na le electrode ea khalase, e leng lera le tšesaane, le bonolo la khalase le arabelang liphetohong tsa asiti kapa alkalinity ea tharollo. Lera le koahetsoe ka thepa e khethehileng e hlahisang matla a motlakase ha a pepesehetse tharollo ea asiti kapa ea motheo. Ka lehlakoreng le leng, electrode ea boitsebiso e fana ka matla a tsitsitseng a motlakase a sebelisoang e le papiso le bokhoni bo hlahisoang ke electrode ea khalase. Phapang ea matla a motlakase pakeng tsa li-electrode tse peli joale e lekanyetsoa ka pH meter, 'me ho baloa pH ho baloa.
Bohlokoa ba Methara ea pH ho Tlhahlobo ea Laboratori
Mmitha ea pH ke sesebelisoa sa bohlokoa tlhahlobong ea laboratori, 'me e sebelisoa lits'ebetsong tse fapaneng, ho kenyelletsa:
1. Teko ea Tikoloho
Tekong ea tikoloho, pH metres e sebelisoa ho lekanya pH ea mobu, metsi le moea. Tlhahisoleseding ena e bohlokwa ho lekola boleng ba tikoloho le ho hlwaya mehlodi e ka bang teng ya tshilafalo.
2. Teko ea Lijo le Lino
Ka indasteri ea lijo le lino, pH metres e sebelisoa ho lekola acidity kapa alkalinity ea lihlahisoa tse fapaneng. Lintlha tsena li bohlokoa ho netefatsa hore sehlahisoa se bolokehile hore se ka sebelisoa le hore se fihlela litlhoko tsa taolo.
3. Tlhahlobo ea Meriana
Ha ho etsoa tlhahlobo ea meriana, pH metres e sebelisoa ho lekanya pH ea metsoako ea lithethefatsi. Tlhahisoleseding ena ke ea bohlokoa ho netefatsa hore moriana o tsitsitse ebile o sebetsa hantle.
4. Tlhahlobo ea Lik'hemik'hale
Ha ho hlahlojoa lik'hemik'hale,pH metresli sebelisetsoa ho lekanya pH ea tharollo, ho kenyelletsa le li-acids le metheo. Tlhahisoleseding ena ke ea bohlokoa ho khethollang ho teba ha tharollo le ho khetholla mekhoa efe kapa efe e ka 'nang ea etsahala.
Mefuta ea pH Methareng
Ho na le mefuta e 'meli e meholo ea pH metres: analog le digital.
Analog pH Methara
Analog pH metres ke mofuta oa khale oa pH meter, 'me ba sebelisa nale le sekala ho bontša pH ho bala. Limithara tsena li theko e tlase ho feta tsa dijithale, empa ha lia nepahala ebile ha lia nepahala.
Digital pH Methara
Digital pH metres ke mofuta wa sejwalejwale wa pH meter, mme ba sebedisa sekirini sa LCD ho bontsha pH ho bala. Limithara tsena li nepahetse ebile li nepahetse ho feta li-analog, empa li theko e boima haholo.
Tekanyo ea Metha ea pH
Tekanyetso ke mohato oa bohlokoa oa ho netefatsa hore pH meter e fana ka lipalo tse nepahetseng le tse nepahetseng. Calibration e kenyelletsa ho lokisa methara hore e tsamaellane le pH ea tharollo e tloaelehileng e tsebahalang. Ho lekanya pH meter, o tla hloka sete ea tharollo e tloaelehileng e nang le boleng bo tsebahalang ba pH. Litharollo tsena li lokela ho akaretsa mefuta e mengata ea pH eo u tla e leka. Methara ea pH e qala ka ho lekanyetsoa ho tharollo e tloaelehileng ea asiti kapa ea mantlha, ebe e lekanyetsoa ho litharollo tse setseng ho latela pH e ntseng e eketseha.
Tlhokomelo ea Methara ea pH
Tlhokomelo e nepahetseng ea meter ea pH e bohlokoa ho netefatsa hore e fana ka lipalo tse nepahetseng le tse nepahetseng. Malebela a mang a ho boloka pH meter a kenyelletsa:
- Ho hloekisa kamehla ha probe le li-electrode
- Ho boloka pH meter sebakeng se omeletseng le se phodileng
- Ho lekanya metara khafetsa
- Ho fetola probe le li-electrode ha ho hlokahala
Nako ea poso: May-06-2023