Tsis paub qhov ntsuas pH meter?
Lub pH meter yog ib qho cuab yeej tseem ceeb rau kev ntsuas pH ntawm kev daws teeb meem, thiab siv dav hauv kev lag luam, hluav taws xob hluav taws xob, kev ua liaj ua teb, tshuaj, zaub mov, kev tshawb fawb, thiab kev tiv thaiv ib puag ncig. Thaum siv lub ntsuas pH, cov neeg siv yuav tsum muaj qee qhov kev nkag siab ntawm nws cov ntsiab lus thiab ntsuas cov ntsiab lus, kom nws yooj yim dua rau siv.
PH meter ntsuas txoj cai
Lub hauv paus ntsiab lus thiab cov qauv ntawm ib qho pH meter zoo tib yam tau qhia hauv daim duab saum toj no. Kev ua haujlwm ntawm hydrogen ion ntawm cov kua yuav tsum tau kuaj yog siv los ua qhov sib txawv ntawm ob lub electrodes, thiab cov teeb liab kis tau los ntawm lub transmitter los ntsuas pH tus nqi.
Cov electrode siv raws li kev siv yog hu ua iav electrode, thiab zoo nkaus li zoo ib yam li iav raj hauv qhov tsos. Txawm li cas los xij, lub hauv ntej kawg yog nyias zaj duab xis iav ntawm ob peb kaum ntawm μm ua los ntawm cov iav tshwj xeeb, thiab sab hauv tsis muaj hluav taws xob thiab cov hluav taws xob sab hauv yog tsim nyob rau hauv. Muaj cov iav zaj duab xis ntawm cov electrode sab hauv thiab cov kua ntsuas, uas yog qhov yooj yim insulated.
Lub electrode ntawm lwm qhov kawg yog hu ua kev sib piv electrode (los yog siv electrode), uas zoo sib xws hauv cov qauv rau cov iav electrode, tab sis muaj cov kua dej sib txuas ntawm sab xub ntiag, thiab cov kua sab hauv hu rau cov kua ntsuas los ntawm cov qhov sib txawv. Muaj ntau cov duab ntawm cov kua hlws ris, nrog rau cov iav fiber ntau, lub qhov me me, cov duab ceramic, cov duab casing, thiab lwm yam, uas tuaj yeem xaiv raws li daim ntawv thov tshwj xeeb.
Qhov impedance ntawm qhov kev kuaj pom muaj ntau dua 10MΩ vim yog iav zaj duab xis, yog li qhov kev sib kis yuav tsum muaj qhov siab dua impedance, uas yuav tsum ncav cuag ntau dua 1GΩ, thiab cov xov hluav taws xob thiab cov khoom siv hluav taws xob kuj tseem siv nruab nrab ntawm lub amplifier thiab electrodes.
Kev ua haujlwm ntawm hydrogen ion ntawm cov dej ntsuas ua rau muaj peev xwm sib txawv ntawm ob sab ntawm cov iav nyias nyias ntawm cov iav electrode. Lub peev xwm sab hauv ntawm cov iav zaj duab xis nyias ntawm cov iav electrode dhau los ntawm kev daws teeb meem sab hauv thiab tau muab los ntawm cov electrode sab hauv; Thaum lub peev xwm sab nrauv ntawm cov kua yog muab los ntawm cov khoom siv hluav taws xob sab hauv ntawm cov khoom siv electrode los ntawm cov kua los ntsuas-reference electrode kua junction-internal kua. Lub peev xwm tsim los ntawm cov khoom siv hluav taws xob sab hauv ntawm ob lub electrodes thiab cov kua dej sab hauv roughly tshem tawm ib leeg tawm, yog li qhov muaj peev xwm ntawm ob sab ntawm cov iav iav tuaj yeem ntsuas.
