daws qhov teeb meem ntawm me me electrode ntawm PH meter
Cov ntaub ntawv ntawm electrode yog dab tsi? Feem ntau, muaj ob hom pH electrode casings: PC yas (polycarbonate) casing thiab iav casing. Lub PC casing tiv taus kev sib tsoo thiab kev cuam tshuam, tab sis qhov siv tau kub tsawg dua 80oC. Thiab nws yog ib qho yooj yim rau corrode nyob rau hauv siab alkaline tov thiab ib co xov xwm. Qhov ntsuas kub ntawm lub khob iav yog 0-150oC, thiab feem ntau nws tsis yog corroded tsuas yog cov tshuaj hydrofluoric acid, tab sis nws yooj yim rau kev puas tsuaj los ntawm kev sib tsoo. Stainless hlau, PTFE, hlau, thiab lwm yam.
Dab tsi yog qhov sib txawv ntawm kev siv cov khoom sib txawv ntawm electrodes? Pc yas, polycarbonate, PC plhaub yog resistant rau kev sib tsoo thiab kev cuam tshuam, tab sis nws yog haum rau PTFE electrode nrog kub tsawg tshaj li 80oC, uas yog feem ntau hu ua yas huab tais, tsuas yog rau ib co organic solvents. Cov iav electrode tuaj yeem tiv taus kub thiab corrosion (tshwj tsis yog hydrofluoric acid) thiab yooj yim tawg. Yog tias qhov nruab nrab nrog HF thiab tsis muaj corrosiveness ntawm 0-100 degrees Celsius, stainless hlau electrode yuav siv tau; Yog tias qhov nruab nrab muaj cov kuab tshuaj organic, PTFE electrode tuaj yeem siv tau, uas tuaj yeem tiv taus qhov kub thiab txias, txog 280 degrees Celsius; PH electrode * Qhov kub siab tuaj yeem ncav cuag 130 degrees Celsius, thiab cov khoom siv hluav taws xob tuaj yeem pom zoo rau cov neeg siab dua 130 degrees Celsius.
3 Lub neej ntawm cov electrode nyob rau hauv ib txwm siv ntev npaum li cas?
Feem ntau, cov electrodes yog siv rau rau lub hlis mus rau ib xyoos, nyob ntawm seb cov kev ua hauj lwm tej yam kev mob, thiab ib co yog siv rau ib tug thiab ib nrab mus rau ob xyoos. Cov khoom lag luam tuaj yeem siv sijhawm ntev li 3-5 xyoo, tab sis tus nqi kim!
4. Yuav tiv thaiv electrode li cas? (1) Cov iav zaj duab xis nyob rau hauv qis kawg ntawm iav electrode yog yooj yim tawg, thiab nws yog txwv tsis pub tiv tauj nrog cov khoom tawv. (2) Thaum nws tau siv thawj zaug, ib feem ntawm cov iav kheej kheej yuav tsum tau tsau rau hauv dej distilled hnub thiab hmo ntuj. Nws tseem yuav tsum tau soaked hauv dej distilled thaum tsis siv, kom cov txheej txheem soaking tau yooj yim dua lwm zaus. (3) Thaum ntsuas cov tshuaj alkaline muaj zog, nws yuav tsum tau ua kom sai li sai tau, thiab ntxuav nrog dej tam sim tom qab ntsuas, kom tsis txhob muaj cov tshuaj alkali los ntawm corroding iav zaj duab xis. (4) Cov iav zaj duab xis yuav tsum tsis txhob stained nrog roj. Yog tias qhov no tshwm sim, Gangfu yog thawj zaug raus rau hauv distiller cov nplej, tom qab ntawd muab tso rau hauv ether lossis carbon tetrachloride, tom qab ntawd hloov mus rau hauv cawv, thiab thaum kawg ntxuav nrog dej thiab muab tso rau hauv tib neeg dej. (5) Lub raj plexiglass ntawm lub tshuab hluav taws xob muaj qhov ua tau zoo ntawm kev rwb thaiv tsev, thiab nws yog txwv tsis pub tiv tauj nrog cov tshuaj los yog roj stains.
5. Kuv yuav ua li cas yog tias kuv tsis siv lub tshuab electrode ntev? Kev khaws cia thiab ntxuav cov iav electrode ntawm ph meter: lub sij hawm luv luv: cia hauv cov tshuaj tsis haum nrog pH=4; Lub sij hawm ntev: khaws cia hauv cov tshuaj tsis haum nrog pH=7. Kev kis kab mob ntawm cov iav electrode teeb yuav ua rau lub sijhawm teb electrode. Koj tuaj yeem so cov av nrog CCl4 los yog xab npum, thiab tom qab ntawd muab tso rau hauv dej distilled rau ib hmos thiab siv nws mus ntxiv. Thaum cov pa phem hnyav, 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 0.1NHCl tov rau ib hnub thiab hmo ntuj ua ntej siv txuas ntxiv.
6. Dab tsi yog qhov txawv ntawm lub neej thiab tus nqi ntawm cov khoom siv hluav taws xob hauv tsev thiab cov khoom siv hluav taws xob txawv teb chaws? Kev pabcuam lub neej ntawm cov khoom siv hluav taws xob hauv tsev tsis yog ntev li ntev raws li cov khoom siv electrodes. Raws li ib txwm muaj, nws tuaj yeem siv tau li ntawm 2-3 xyoo, thaum lub tshuab hluav taws xob hauv tsev tuaj yeem siv tau rau 1-1.5 xyoo nyob rau hauv ib txwm muaj, tshwj tsis yog muaj xwm txheej tshwj xeeb. Tab sis tus nqi ntawm cov hluav taws xob hauv tsev yog pheej yig dua li cov khoom siv hluav taws xob txawv teb chaws.
