Taw qhia txog Kev Kho ntawm pH Meter
1, Txoj cai ntawm pH meter
Los ntawm kev ntsuas qhov sib txawv ntawm cov roj teeb ua haujlwm uas tsim los ntawm cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob siv hauv kev daws teeb meem, thiab siv cov kev sib raug zoo ntawm pH tus nqi ntawm cov tshuaj yuav tsum tau kuaj thiab cov peev xwm loj ntawm cov roj teeb ua haujlwm, qhov ntsuas tau hloov pauv. nyob rau hauv pH ntsuas ntsuas siv ammeter.
2, Kev saib xyuas ntawm pH ntsuas
1. Cia ntawm pH meter iav electrodes
Thaum lub ntsuas pH tsis siv rau lub sijhawm luv luv, nws tuaj yeem muab tso rau hauv cov kua dej saturated Potassium chloride.
2. Kev ntxuav ntawm pH iav electrodes
Kev kis kab mob ntawm lub iav electrode qhov muag yuav ncua lub sij hawm teb electrode. So cov av nrog CCl4 los yog tshuaj xab npum, ces muab tso rau hauv dej distilled rau ib hnub thiab hmo ntuj ua ntej siv txuas ntxiv. Thaum cov pa phem hnyav heev, nws tuaj yeem tsau rau hauv 5 feem pua HF cov tshuaj rau 10-20 feeb, tam sim ntawd yaug nrog dej, thiab muab tso rau hauv ib qho 0.1M HCl tov rau ib hnub thiab hmo ua ntej txuas ntxiv siv.
3. Kev kho cov iav Electrode Aging
Kev laus ntawm iav electrodes muaj feem xyuam nrog kev hloov pauv ntawm cov nplaum txheej txheej txheej. Lub qub electrode muaj cov lus teb qeeb, siab membrane tsis kam, thiab nqes qis. Etching tawm txheej txheej nplaum nrog hydrofluoric acid feem ntau 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 cov khoom siv electrodes
Qhov zoo tshaj plaws cia tshuaj ntawm Silver chloride electrode yog saturated Potassium chloride tov. High concentration Potassium chloride tov tuaj yeem tiv thaiv Silver chloride los ntawm kev nyob ntawm cov kua hlws ris thiab tswj cov kua dej sib txuas hauv kev ua haujlwm. Txoj kev no kuj tseem siv tau rau kev khaws cia ntawm cov khoom siv electrodes.
