Yuav kho pH electrode li cas?
Qhov "kev puas tsuaj" ntawm pH composite electrode, qhov tshwm sim yog qhov rhiab heev gradient txo, cov lus teb qeeb, thiab rov ua dua ntawm 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) Lub qhov muag hluav taws xob thiab cov kua dej sib txuas yog cov kab mob, thiab cov av tuaj yeem ua tib zoo tshem tawm nrog txhuam zoo, paj rwb lossis tshuaj txhuam hniav. Kev tiv thaiv npog ntawm qee lub plhaub yas electrode taub hau tuaj yeem raug tshem tawm, uas yooj yim rau kev ntxuav. Yog tias muaj kuab paug hnyav, nws tuaj yeem ntxuav nrog xab npum raws li txoj hauv kev hauv Tshooj 8.
(2) Cov tshuaj siv sab nraud yog paug, thiab qee cov qauv electrode tuaj yeem muab ntxiv rau cov tshuaj. Lub sijhawm no, cov tshuaj siv sab nraud ntawm cov electrode tuaj yeem tso tawm nrog lub koob txhaj tshuaj, thiab cov tshuaj tshiab 3.3mol / L lossis saturated KCl tau npaj, thiab tom qab ntawd ntxiv mus, ua tib zoo saib ua ntej, thiab tom qab ntawd rub nws tawm thaum ntxiv nws rau lub sijhawm thib ob, txhawm rau ntxuav cov kab noj hniav sab hauv ntawm electrode.
(3) Kev laus ntawm cov iav rhiab zaj duab xis: Soak lub qhov muag hluav taws xob hauv 0.1mol/L dilute hydrochloric acid (9mL hydrochloric acid diluted rau 100mL nrog dej ntshiab) rau 24 teev, ntxuav nws nrog dej ntshiab, thiab tom qab ntawd soak nws nyob rau hauv lub electrode soaking tov rau 24 teev. Yog hais tias tus passivation loj heev, koj tuaj yeem tsau qhov qis kawg ntawm cov electrode hauv 45 hydrofluoric acid tov rau 3 mus rau 5 vib nas this (kev daws teeb meem: 4mL hydrofluoric acid diluted nrog dej ntshiab rau 100mL), ntxuav nws nrog dej ntshiab, thiab tom qab ntawd, Soak lub electrode nyob rau hauv cov tshuaj soaking rau 24 teev los kho nws cov kev ua tau zoo.
