Kev tshuaj xyuas txhua hnub thiab kev saib xyuas cov txheej txheem ntawm pH meter electrode
Txheeb xyuas qhov kev siv ntawm pH meter electrode, seb nws puas tuaj yeem siv tau, thiab cov txheej txheem ntawm kev tswj xyuas, ntxuav thiab rov tsim cov electrode raws li qhov xwm txheej yog raws li hauv qab no. Anhui Secco Environmental Protection Technology Co., Ltd All rights reserved. PH meter tshuaj xyuas: 1. Kev soj ntsuam dav dav ntawm iav electrode
(1) Txheeb xyuas qhov tsis muaj peev xwm thiab teeb tsa pH ntsuas rau qhov ntsuas "mV" ntau yam. Ntxig lub iav electrode thiab cov ntaub ntawv siv electrode rau hauv cov tshuaj tsis muaj pH =6 86. Kev nyeem ntawv ntawm qhov ntsuas yuav tsum yog li -50~ 50mV. ib qho kev xeem
(2) Tshawb xyuas txoj kab nqes kev txuas
1. Tom qab ntawd ntsuas tus nqi mV ntawm cov tshuaj tsis haum nrog pH=4.00 lossis pH=9.18, thiab xam qhov nqes ntawm cov electrode. Cov nqes hav txheeb ze ntawm cov electrode feem ntau yuav tsum tau ua ke nrog cov cim qhia. Daim ntawv ceeb toom:
1) Cov txheej txheem ntawm kev txheeb xyuas qhov tsis muaj peev xwm ntawm cov khoom siv hluav taws xob tsuas yog rau cov iav electrode uas nws qhov taw qhia equipotential yog 7. Yog tias qhov ntsuas equipotential ntawm lub iav electrode tsis yog 7, nws yuav txawv.
2) Rau qee qhov pH ntsuas, thaum lub ntsuas ntsuas thiab kev hloov kho tuaj yeem ua tau raws li qhov yuav tsum tau ua, thiab cov txiaj ntsig kev soj ntsuam saum toj no tsis tawm ntawm qhov ntau, cov electrode tuaj yeem siv tau.
3) Rau qee cov pH ntse ntsuas, koj tuaj yeem xa ncaj qha mus rau xoom lub peev xwm thiab nqes nqes qhov tseem ceeb tau los ntawm kev ntsuas qhov ntsuas ntawm qhov ntsuas.
2. Kev tshuaj xyuas txoj kev siv electrode
(1) Txoj kev ntsuas kev tiv thaiv sab hauv siv lub ntsuas ntsuas ntsuas ntsuas. Ib qho kawg ntawm lub qhov (socket) electrode ntawm lub ntsuas hluav taws xob yog txuas nrog cov khoom siv hluav taws xob, thiab lwm qhov kawg yog txuas nrog cov hlau hlau. Cov ntaub ntawv siv electrode thiab cov hlau hlau yog immersed hauv cov tshuaj tib lub sijhawm. Kev ntsuas sab hauv yuav tsum tsawg dua 10kΩ. Yog tias qhov kev tiv thaiv sab hauv loj dhau lawm, nws txhais tau hais tias cov kua hleb raug thaiv thiab yuav tsum tau ua nrog.
(2) Electrode muaj peev xwm txheeb xyuas Siv cov khoom siv hluav taws xob zoo ntawm tib tus qauv thiab cov ntaub ntawv siv hluav taws xob los kuaj xyuas kom txuas mus rau cov khoom siv kawg ntawm pH meter, thiab tom qab ntawd ntxig KCl tov (los yog tsis muaj tshuaj nrog pH =4. 00) tib lub sijhawm, qhov ntsuas qhov sib txawv yuav tsum yog -3 ~ 3mV, thiab qhov kev hloov pauv yuav tsum tsawg dua ± 1mV. Txwv tsis pub, cov ntaub ntawv siv electrode yuav tsum tau hloov lossis rov tsim dua tshiab.
(3) Kev tshuaj ntsuam xyuas Cov nyiaj-nyiaj chloride hlau yuav tsum yog xim av tsaus. Yog hais tias nws yog dawb, nws txhais tau hais tias cov nyiaj chloride tau ib nrab yaj.
Kev kho PH meter
1. Lub sij hawm luv luv ntawm pH iav electrodes: khaws cia hauv cov tshuaj tsis haum nrog pH =4; mus sij hawm ntev: khaws cia rau hauv cov tshuaj tsis haum nrog pH=7.
2. Kev ntxuav ntawm pH iav electrode. Kev ua qias tuaj ntawm lub teeb ntawm lub iav electrode tuaj yeem ua rau lub sijhawm teb ntawm electrode. Cov av tuaj yeem raug muab tshem tawm nrog CCl4 lossis tshuaj xab npum, thiab tom qab ntawd tsau hauv dej distilled rau ib hnub thiab hmo ntuj ua ntej siv txuas ntxiv. Thaum cov pa phem hnyav, nws tuaj yeem muab tso rau hauv 5 feem pua HF cov tshuaj rau 10-20 feeb, yaug 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. Iav electrode kev laus kev kho mob Kev laus ntawm iav electrodes muaj feem xyuam rau kev hloov maj mam hloov ntawm cov nplaum txheej txheej. Cov laus electrodes muaj cov lus teb qeeb, siab membrane tsis kam, thiab nqes qis. Etching tawm txheej txheej nplaum nrog hydrofluoric acid feem ntau txhim kho electrode kev ua tau zoo. Yog tias txoj kev no tuaj yeem siv tsis tu ncua tshem tawm cov nplaum nplaum sab hauv thiab sab nrauv, lub neej ntawm electrode yuav luag tsis txwv.
4. Kev khaws cia ntawm cov ntaub ntawv siv electrode Cov tshuaj cia ntawm cov nyiaj-silver chloride electrode yog cov tshuaj saturated potassium chloride. Cov tshuaj potassium chloride siab muaj peev xwm tiv thaiv cov nag lossis daus ntawm cov nyiaj chloride ntawm cov kua hlws ris thiab tuav cov kua dej sib txuas hauv kev ua haujlwm. Txoj kev no kuj tseem siv tau rau kev khaws cia ntawm cov khoom siv electrodes.
5. Regeneration ntawm cov ntaub ntawv siv electrode Feem ntau ntawm cov teeb meem ntawm cov ntaub ntawv 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) Soaking kua hlws ris: siv cov sib tov ntawm 10 feem pua saturated potassium chloride tov thiab 90 feem pua cov dej distilled, cua sov mus rau 60-70 degree, raus lub electrode txog 5cm, thiab tsau 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 los ntxuav cov khoom siv hluav taws xob sab hauv, ntws cov kua dej thiab muab tso rau hauv dej ammonia rau 10-20 feeb, tab sis tsis txhob cia cov dej ammonia nkag mus rau hauv lub electrode. Tshem tawm cov electrode thiab ntxuav nws nrog dej distilled, thiab tom qab ntawd ntxiv cov kua filling dua thiab txuas ntxiv siv nws.
(3) Lub tshuab nqus tsev vacuum: muab lub hose nyob ib ncig ntawm cov kua hlws ris ntawm cov khoom siv electrode, siv lub tshuab nqus dej twj tso kua mis, thiab cov kua hauv qhov nqus tau dhau los ntawm cov kua hlws ris kom tshem tawm cov khoom thaiv.
(4) Kev sib txuas ua kua: Cov kua dej sib txuas ntawm cov nyiaj-nyiaj chloride siv electrode yog raus hauv dej npau npau li 10 mus rau 20 vib nas this. Nco ntsoov tias cov electrode yuav tsum tau txias rau chav tsev kub ua ntej boil tom ntej.
(5) Thaum 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 yuav ua rau cov grit hauv kev sib tsoo kom ntsaws rau hauv cov kua sib txuas. Ua rau mob txhaws.
