Cia ntawm pH meter iav electrode
Thaum lub ntsuas pH tsis siv nyob rau lub sijhawm luv luv, nws tuaj yeem muab tso rau hauv cov tshuaj saturated potassium chloride. Tab sis yog tias nws tsis siv rau lub sijhawm ntev, nws yuav tsum tau qhuav thiab tsis txhob ntub rau hauv cov tshuaj ntxuav tes lossis lwm cov tshuaj nqus dej.
2. Kev ntxuav ntawm pH iav electrodes
Kev kis kab mob ntawm cov iav electrode npuas tuaj yeem ua rau lub sijhawm teb electrode. Siv CCl4 los yog tshuaj xab npum los so cov av, ces muab tso rau hauv dej distilled rau ib hnub thiab hmo ntuj ua ntej siv txuas ntxiv. Thaum muaj kuab paug hnyav, soak hauv 5% HF tov rau 10-20 feeb, yaug nrog dej tam sim ntawd, thiab tom qab ntawd muab tso rau hauv 0.1N HCl tov rau ib hnub thiab hmo ntuj ua ntej siv txuas ntxiv.
3. Kev kho kev laus ntawm iav electrodes
Kev laus ntawm cov iav electrodes muaj feem xyuam nrog kev hloov maj mam hloov ntawm cov nplaum txheej txheej. Lub qub electrode muaj cov lus teb qeeb, siab membrane tsis kam, thiab qis nqes. Etching tawm txheej txheej ntawm cov nplaum nplaum nrog hydrofluoric acid feem ntau tuaj yeem txhim kho electrode kev ua tau zoo. Yog tias txoj kev no tuaj yeem siv tsis tu ncua tshem tawm cov nplaum nplaum sab hauv thiab sab nrauv, lub neej ntev ntawm cov electrode yuav luag tsis kawg.
4. Cia khoom siv electrode
Qhov zoo tshaj plaws cia tshuaj rau cov nyiaj chloride electrodes yog saturated potassium chloride tov. High concentration potassium chloride tov tuaj yeem tiv thaiv cov nyiaj chloride los ntawm precipitating ntawm cov kua interface thiab tswj cov kua hauv kev ua haujlwm. Txoj kev no kuj tseem siv tau rau kev khaws cia ntawm cov khoom siv electrodes.
Lub hauv paus ntsiab lus ntawm pH meter
Los ntawm kev ntsuas qhov sib txawv ntawm cov roj teeb ua haujlwm uas muaj cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob hauv kev daws teeb meem, thiab siv cov kev sib raug zoo ntawm pH tus nqi ntawm cov tshuaj ntsuam xyuas thiab lub peev xwm ntawm cov roj teeb ua haujlwm, qhov ntsuas tau ua tiav los ntawm kev hloov mus rau hauv tus nqi pH siv lub ammeter.
