Txoj kev siv los ntawm pH meter thiab tu electrode ntawm pH meter
Ua ntej, lub installation ntawm acidity meter
①Qhov voltage thiab zaus ntawm cov khoom siv hluav taws xob yuav tsum ua raws li cov ntaub ntawv teev tseg ntawm daim ntawv teev npe ntawm qhov ntsuas, thiab yuav tsum tau ua kom zoo, txwv tsis pub tus taw tes yuav tsis ruaj khov thaum ntsuas.
② Lub ntsuas yog nruab nrog iav electrodes thiab calomel electrodes. Clip Bakelite cap ntawm iav electrode rau lub me me clip ntawm lub electrode tuav. Clip lub hau hlau ntawm lub calomel electrode mus rau qhov loj clip ntawm tus tuav electrode. Qhov siab ntawm ob lub electrodes tuaj yeem hloov kho siv cov ntsia hlau standoff ntawm tus tuav electrode.
③ Cov iav electrode yuav tsum tau tsau rau hauv dej distilled rau ntau tshaj 24 teev ua ntej siv thawj zaug. Nws tseem yuav tsum tau soaked hauv dej distilled thaum tsis siv.
④ Ua ntej thawj zaug siv cov calomel electrode, nws yuav tsum tau soaked nyob rau hauv ib tug saturated potassium lvide tov, thiab tsis txhob soaked nyob rau hauv dej distilled nrog lub iav electrode. Thaum tsis siv, tseem tsau rau hauv saturated potassium lv3 tov los yog npog lub capillary ntawm qis kawg ntawm calomel electrode nrog lub hau roj hmab.
Qhov thib ob, kho
① Tig lub "pH-mv" hloov mus rau pH txoj hauj lwm.
② Qhib lub hwj chim, qhov taw qhia lub teeb yuav pib thaum pib, thiab nws yuav preheat rau 30 feeb.
③ Tshem tawm lub khob me me uas muaj dej distilled, thiab siv cov ntawv lim kom maj mam nqus cov dej ntau dhau ntawm cov iav electrode. Ncuav cov txheej txheem tsis sib xws ntawm pH paub rau hauv lub khob me me. Dip cov electrodes. Saib xyuas kom lub pob taub ntawm lub iav electrode thiab capillary pores ntawm calomel electrode raus hauv cov tshuaj. Maj mam co lub khob me me kom cov tshuaj sib npaug sib npaug ntawm cov electrode.
④ Raws li pH ntawm tus qauv tsis haum, tig qhov hloov mus rau 0 ~ 7 lossis 7 ~ 14.
⑤ Kho qhov ntsuas kub tswj qhov kub kom qhov ntsuas kub qhia los ntawm lub pob qhov rooj yog tib yam li chav tsev kub.
⑥ Kho tus taw tes xoom kom tus taw tes taw qhia rau pH7.
⑦ Maj mam nias los yog tig tus nyeem ntawv hloov me ntsis kom qhov hloov mus daig. Kho lub qhov rooj qhov rooj kom lub pointer tsuas yog taw qhia rau pH tus nqi ntawm cov txheej txheem tsis haum. Tso tawm qhov hloov pauv nyeem ntawv thiab rov ua haujlwm kom txog thaum tus nqi ruaj khov.
⑧ Tom qab kev hloov kho, tsis txhob tig lub pob qhov rooj dua, txwv tsis pub nws yuav tsum tau kho dua. Tshem lub khob me me ntawm cov txheej txheem tov thiab yaug cov electrode nrog dej distilled.
Thaum kawg, ntsuas
① Tshem tawm cov dej ntau dhau ntawm lub tshuab hluav taws xob los yog yaug nws ob zaug nrog cov kev daws teeb meem, tom qab ntawd muab cov electrode tso rau hauv cov tshuaj ntsuam xyuas, thiab tig los yog co lub khob me me maj mam ua kom cov tshuaj tiv thaiv electrode sib npaug.
② Qhov kub ntawm cov tshuaj yuav tsum tau kuaj yuav tsum zoo ib yam li cov txheej txheem buffer tov.
③ Kho qhov xoom txoj hauj lwm, nias qhov hloov pauv, tus nqi taw qhia los ntawm tus taw tes yog pH ntawm cov kua yuav tsum tau kuaj. Yog tias tus pointer nyeem ntawv tshaj qhov ntsuas thaum ntsuas nyob rau hauv thaj tsam ntawm pH 0 ~ 7, qhov hloov pauv yuav tsum muab tso rau ntawm pH7 ~ 14 thiab tom qab ntawd ntsuas.
④ Tom qab kev ntsuas tiav, tom qab tso tawm qhov hloov pauv, tus taw qhia yuav tsum taw tes rau pH 7, txwv tsis pub rov kho dua.
⑤ Tua lub hwj chim, yaug lub electrode, thiab tsau nws raws li cov txheej txheem saum toj no.
