Kev piav qhia ntawm qhov tseeb rov qab ntawm pH electrode ntawm pH meter
Thaum muaj qhov kev ntsuas tseem ceeb hauv pH electrode ntawm peb lub ntsuas pH, peb yuav tsum paub tias qee yam tau pib cuam tshuam rau pH electrode ntawm pH meter.
Qhov tshwm sim ntawm "kev puas tsuaj" rau lub pH meter composite pH electrode yog qhov txo qis hauv qhov rhiab heev gradient, qeeb teb, thiab kev nyeem ntawv tsis zoo, uas yuav tshwm sim los ntawm peb yam. Feem ntau, cov neeg siv khoom tuaj yeem siv cov txheej txheem tsim nyog los kho nws.
(1) Lub qhov muag hluav taws xob thiab cov kua hluav taws xob yog cov paug, thiab cov av tuaj yeem ua tib zoo tshem tawm siv txhuam zoo, paj rwb pob, lossis txhuam hniav. Lub npog tiv thaiv ntawm lub taub hau ntawm qee cov pwm pH electrodes tuaj yeem raug tshem tawm kom ntxuav tau yooj yim dua. Yog tias muaj kuab paug hnyav heev, cov tshuaj ntxuav tau siv tau raws li txoj kev dhau los.
(2) Cov tshuaj siv sab nraud yog paug. Rau rechargeable electrodes, KCl tshiab tuaj yeem npaj thiab ntxiv. Ua tib zoo ncuav nws tawm dua thaum thawj thiab thib ob ntxiv los ntxuav cov kab noj hniav electrode.
(3) Kev laus ntawm iav rhiab zaj duab xis: Soak lub qhov muag hluav taws xob hauv 0. lmol / L diluted hydrochloric acid rau 24 teev. Ntxuav nrog dej ntshiab thiab tsau cov electrode hauv kev daws rau 24 teev. Yog hais tias tus passivation hnyav heev, qhov qis kawg ntawm cov electrode tuaj yeem muab tso rau hauv 4 feem pua hydrofluoric acid tov rau 3-5 vib nas this (kev daws teeb meem: 4ml ntawm hydrofluoric acid diluted rau 100m1 nrog dej ntshiab), ntxuav nrog dej ntshiab. , thiab tom qab ntawd tsau rau hauv cov tshuaj electrode immersion rau 24 teev los kho nws cov kev ua tau zoo.
