Txoj kev siv thiab tu cov electrode kom raug
Tam sim no, cov electrodes siv nyob rau hauv lub chaw soj nstuam yog tag nrho cov composite electrodes, uas muaj qhov zoo ntawm kev siv yooj yim, tsis muaj kev cuam tshuam los ntawm oxidizing los yog txo cov tshuaj, thiab ceev tshuav nyiaj li cas. Thaum siv, lub tes tsho roj hmab ntawm cov kua dej ntawm qhov chaw nres nkoj ntawm lub electrode thiab lub tes tsho roj hmab hauv qab kawg yog tshem tawm tag nrho kom cov hydraulic siab sib txawv ntawm cov tshuaj potassium chloride hauv cov electrode. Nov yog cov lus qhia luv luv rau kev siv thiab kev saib xyuas ntawm electrodes:
1. Thaum tsis siv cov hluav taws xob sib xyaw, nws tuaj yeem muab tso rau hauv 3M potassium chloride tov. Tsis txhob siv cov kua ntxhua khaub ncaws los yog lwm cov tshuaj nqus dej kom ntub thiab ntxuav.
Ua ntej siv, xyuas lub teeb ntawm lub hauv ntej kawg ntawm lub iav electrode. Raws li ib txwm muaj, lub electrode yuav tsum pob tshab tsis muaj kab nrib pleb; Lub teeb yuav tsum tau ntim nrog cov tshuaj, thiab tsis muaj npuas tuaj yeem tshwm sim.
13. Thaum ntsuas cov kev daws teeb meem nrog cov concentration loj, txo lub sij hawm ntsuas kom deb li deb tau, thiab ua tib zoo ntxuav nws tom qab siv los tiv thaiv cov tshuaj ntsuas los ntawm adhering rau cov electrode thiab polluting electrode.
4. Tom qab ntxuav lub tshuab electrode, tsis txhob so cov iav zaj duab xis nrog cov ntawv lim, tab sis siv cov ntawv lim kom nqus tau nws, kom tsis txhob ua kom cov iav zaj duab xis ua kom zoo, tiv thaiv kev sib kis thiab cuam tshuam rau kev ntsuas qhov tseeb.
5. Ua tib zoo saib xyuas qhov tseeb tias cov nyiaj-nyiaj chloride sab hauv siv electrode ntawm cov electrode yuav tsum tau muab tso rau hauv cov tshuaj chloride tsis nyob rau hauv lub qhov muag kom tsis txhob muaj cov dhia hauv cov duab ntawm ammeter. Thaum siv, xyuam xim rau maj mam viav vias electrode ob peb zaug.
Kev npaj thiab cia cov txheej txheem tsis daws teeb meem
1. Cov khoom siv pH yuav tsum muab cia rau hauv qhov chaw qhuav. Piv txwv li, cov khoom siv sib xyaw phosphate pH yuav deliquesce thaum huab cua av noo siab. Thaum deliquescence tshwm sim, cov khoom siv pH siv tsis tau.
2. Secondary distilled dej los yog deionized dej yuav tsum tau siv los npaj pH txheem tov. Yog tias nws siv rau 0.1 qib pH meter ntsuas, cov dej distilled zoo tib yam siv tau.
3. Cov tshuaj pH txheem yuav tsum tau diluted nrog ib tug me me beaker kom txo tau cov pH txheem tov ntawm lub beaker phab ntsa. Cov hnab yas lossis lwm lub thawv rau khaws cov khoom siv pH yuav tsum tau muab ntxuav, thiab cov dej distilled yuav tsum tau siv rau kev ntxuav ntau zaus, thiab tom qab ntawd muab nchuav rau hauv cov txheej txheem pH npaj los xyuas kom meej qhov tseeb ntawm cov txheej txheem pH npaj.
4. Cov txheej txheem kev daws teeb meem feem ntau tuaj yeem khaws cia rau 2-3 hli. Yog tias pom tias muaj turbid, pwm los yog nag lossis daus, nws yuav siv tsis tau ntxiv lawm.
5. Alkaline txheem tov yuav tsum tau muab ntim rau hauv lub raj mis polyethylene. Tiv thaiv cov pa roj carbon dioxide los ntawm kev tsim cov pa roj carbonic acid tom qab nkag mus rau cov txheej txheem kev daws teeb meem thiab txo nws cov nqi pH.
