Restoring qhov tseeb ntawm pH meter pH electrode
Thaum peb pH meter pH electrode muaj qhov kev ntsuas loj, peb yuav tsum paub tias qee yam tau pib cuam tshuam rau pH meter pH electrode.
Qhov "kev puas tsuaj" ntawm pH meter's composite pH electrode yog tus cwj pwm los ntawm kev txo qis rhiab heev gradient, qeeb teb, thiab kev nyeem ntawv tsis zoo. Tej zaum nws yuav tshwm sim los ntawm peb yam hauv qab no. Feem ntau, cov neeg siv khoom tuaj yeem siv cov txheej txheem tsim nyog los kho nws.
(1) Yog tias lub qhov muag hluav taws xob thiab cov kua dej sib txuas tsis sib haum, koj tuaj yeem siv cov txhuam hniav zoo nkauj, paj rwb pob lossis txhuam hniav kom ua tib zoo tshem cov av. Kev tiv thaiv npog ntawm lub taub hau ntawm qee cov yas pH electrodes tuaj yeem raug tshem tawm, ua kom huv si yooj yim dua. Yog tias cov pa phem hnyav, koj tuaj yeem siv cov tshuaj ntxuav tes los ntxuav nws raws li txoj kev dhau los.
(2) Cov tshuaj siv sab nraud yog paug. Rau rechargeable electrodes, koj tuaj yeem npaj cov tshuaj KCl tshiab thiab ntxiv rau hauv. Ua tib zoo nchuav nws thaum ntxiv rau thawj zaug thiab zaum ob los ntxuav cov kab noj hniav ntawm cov electrode.
3) Kev laus ntawm iav rhiab zaj duab xis: Soak lub qhov muag hluav taws xob hauv 0.1mol/L dilute hydrochloric acid rau 24 teev. Yaug nrog dej ntshiab thiab tsau rau hauv cov tshuaj electrode soaking rau 24 teev. Yog hais tias tus passivation loj heev, koj tuaj yeem tsau qhov qis kawg ntawm cov electrode hauv 4% hydrofluoric acid tov rau 3 mus rau 5 vib nas this (kev daws teeb meem: 4ml hydrofluoric acid yog diluted rau 100m1 nrog dej ntshiab), ntxuav nws nrog dej ntshiab, thiab Tom qab ntawd muab tso rau ntawm lub electrode Soak hauv cov kua dej so rau 24 teev kom rov ua haujlwm.
