Yuav ua li cas tswj tus ph meter
1. Cia ntawm pH iav electrode
Lub sij hawm luv luv: khaws cia hauv cov tshuaj tsis haum nrog pH=4;
Lub sij hawm ntev: khaws cia hauv cov tshuaj tsis nrog pH =7.
2. Kev ntxuav ntawm pH iav electrode
Kev kis kab mob ntawm cov iav electrode teeb yuav ua rau lub sijhawm teb electrode. Koj tuaj yeem so cov av nrog CCl4 lossis xab npum, thiab muab tso rau hauv dej distilled rau ib hmos thiab siv nws mus ntxiv. Thaum cov pa phem hnyav heev, nws tuaj yeem tsau rau hauv 5 feem pua HF cov tshuaj rau 10 ~ 20 feeb, ntxuav nrog dej tam sim ntawd, thiab muab tso rau hauv 0.1N HCl tov rau ib hnub thiab hmo ntuj ua ntej siv txuas ntxiv.
3. Kev kho kev laus ntawm iav electrode
Kev laus ntawm iav electrode yog cuam tshuam nrog kev hloov pauv ntawm cov nplaum txheej txheej txheej. Lub qub electrode muaj cov lus teb qeeb, siab membrane tsis kam thiab qis nqes hav. Etching tawm txheej txheej roj hmab nrog hydrofluoric acid feem ntau tuaj yeem txhim kho cov electrode kev ua tau zoo. Yog tias txoj kev no tuaj yeem siv los tshem tawm cov roj hmab sab hauv thiab sab nrauv tsis tu ncua, lub neej ntawm cov electrode yuav luag tag nrho.
4. Cia khoom siv electrode
Qhov zoo tshaj plaws cia tshuaj rau cov nyiaj-nyiaj chloride electrode yog saturated potassium chloride tov. High concentration potassium chloride tov tuaj yeem tiv thaiv cov nyiaj chloride los ntawm precipitating ntawm cov kua hlws ris thiab ua kom cov kua sib txuas ua haujlwm. Txoj kev no kuj tsim nyog rau kev khaws cia ntawm cov electrodes sib xyaw.
5. Regeneration ntawm siv electrode
Feem ntau ntawm cov teeb meem ntawm kev siv electrode yog tshwm sim los ntawm kev txhaws ntawm cov kua hlws ris, uas tuaj yeem daws tau los ntawm cov txheej txheem hauv qab no:
(1) Immersion kua hlws ris: cov kua sib xyaw ntawm 10 feem pua saturated potassium chloride tov thiab 90 feem pua cov dej distilled yog rhuab mus rau 60 ~ 70 degree, thiab cov electrode yog immersed nyob rau hauv li 5cm rau 20 feeb mus rau 1 teev. Txoj kev no tuaj yeem yaj cov crystals ntawm qhov kawg ntawm cov electrode.
(2) Ammonia soaking: Thaum cov kua hleb raug thaiv los ntawm cov nyiaj chloride, nws tuaj yeem soaked nrog cov concentrated ammonia dej. Txoj kev tshwj xeeb yog sau cov electrode thiab ntxuav nws, ces muab tso rau hauv dej ammonia rau 10 ~ 20 feeb tom qab cov kua dej ntws tawm, tab sis tsis txhob cia dej ammonia nkag mus rau hauv electrode. Tshem tawm cov hluav taws xob, ntxuav nws nrog dej distilled, thiab ntxiv cov kua dej sab hauv ntxiv rau kev siv ntxiv.
(3) Nqus txoj kev: lub tes tsho lub hose nyob ib ncig ntawm cov kua hlws ris ntawm cov ntaub ntawv siv electrode, siv ib tug dej ntws nqus twj tso kua mis, thiab sau cov kua nyob rau hauv lub suction ib feem los ntawm cov kua hlws ris kom tshem tawm cov neeg kho tshuab blockage.
(4) boiling kua hlws ris: cov kua hlws ris ntawm cov nyiaj-silver chloride siv electrode yog immersed nyob rau hauv boiling dej rau 10-20 vib nas this. Nco ntsoov tias cov electrode yuav tsum tau txias rau hauv chav tsev kub ua ntej boiling tom ntej.
(5) Thaum tag nrho cov txheej txheem saum toj no tsis muaj txiaj ntsig, cov txheej txheem kev sib tsoo ntawm cov ntawv xuab zeb tuaj yeem siv los tshem tawm qhov txhaws. Txoj kev no tuaj yeem ua rau cov xuab zeb hauv av tau ntim rau hauv cov kua dej sib txuas. Ua rau muaj kev cuam tshuam mus tas li.
