Yuav ua li cas ntxuav pH electrode?
Tom qab kev sib kis ntawm qhov sib cuam tshuam ntawm lub teeb thiab cov kua, ua ntej ntxuav nrog cov kuab tshuaj hauv qab no, tom qab ntawd yaug nrog dej deionized kom tshem tawm cov kuab tshuaj, thiab muab cov electrode tso rau hauv cov kua dej kom ua kom muaj zog.
Pollutant cleaning tus neeg saib xyuas
Inorganic hlau oxides qis dua 1mol / L dilute acid
Organic roj thiab rog li dilute detergents (tsis muaj zog acidic)
Resin polymer tshuaj, dilute cawv, acetone, ether
Protein ntshav cell precipitate acidic enzyme daws (cov zaub mov nyoos)
Pigment raws li tshuaj, dilute tshuaj dawb, hydrogen peroxide
Yuav kho cov pH electrode li cas?
Qhov tshwm sim ntawm "kev puas tsuaj" rau pH composite electrodes yog qhov txo qis hauv rhiab heev gradient, qeeb teb, thiab tsis zoo rov qab nyeem ntawv, uas tej zaum yuav tshwm sim los ntawm peb yam nram 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 paug, thiab cov av tuaj yeem ua tib zoo tshem tawm siv txhuam zoo, paj rwb, lossis txhuam hniav. Lub npog tiv thaiv ntawm lub taub hau ntawm qee cov ntaub ntawv molded electrodes tuaj yeem unscrewed kom yooj yim tu. Yog tias muaj kuab paug hnyav, nws tuaj yeem ntxuav nrog tus neeg ua haujlwm tu raws li txoj hauv kev hauv Tshooj 8.
(2) Cov tshuaj siv sab nraud yog paug, thiab qee cov qauv electrode tso cai rau kev sib ntxiv ntawm cov tshuaj. Thaum lub sijhawm no, lub syringe tuaj yeem siv los rho tawm cov kev siv sab nraud ntawm cov electrode, npaj ib qho tshiab 3.3mol / L lossis saturated KCl tov, thiab ntxiv nws dua. Ua tib zoo saib rau thawj thiab thib ob ntxiv, thiab tom qab ntawd muab rho tawm dua los ntxuav cov kab noj hniav hauv 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 (9mL hydrochloric acid diluted mus rau 100mL nrog dej ntshiab) rau 24 teev, ntxuav nrog dej ntshiab, thiab tom qab ntawd tsau dej. electrode nyob rau hauv cov kua dej so rau 24 teev. Yog hais tias tus passivation hnyav heev, qhov qis kawg ntawm cov electrode kuj tuaj yeem muab tso rau hauv 45 feem pua ntawm hydrofluoric acid tov rau 3-5 vib nas this (kev daws teeb meem: 4mL hydrofluoric acid diluted rau 100mL 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.
