Cov teeb meem uas yuav tsum tau them sai sai rau thaum siv PH meter
A, ua ntej ua haujlwm, yuav tsum xub xyuas qhov tseeb ntawm cov electrode. Tam sim no, feem ntau ntawm cov electrodes siv nyob rau hauv PH meters yog composite electrodes, thaum lub qub tiam ntawm pH meters tseem siv iav electrodes thiab calomel electrodes. Vim tias cov khoom siv hluav taws xob sib xyaw tau siv dav, cov khoom siv hluav taws xob feem ntau tau tham hauv qab no.
Calibration, calibrate lub ntsuas raws li cov lus qhia ntsuas, thiab kho cov kua yuav tsum tau kuaj thiab tus qauv buffer tov rau tib qhov kub thiab txias. Ua ntej, ntxig cov electrode rau hauv cov txheej txheem tsis haum uas nws PH qhov sib txawv nrog cov qauv kuaj tsis ntau tshaj ob chav PH, pib qhov kev nyeem ntawv hloov, kho tus positioner los ua qhov kev nyeem ntawv tsuas yog PH ntawm cov qauv kev daws teeb meem, thiab rov ua ob peb zaug rau. ua kom kev nyeem ntawv ruaj khov. Tshem tawm cov electrode thiab ntxuav nws, thiab tom qab ntawd ntxig rau hauv * * cov txheej txheem tsis haum. Tom qab qhov ntsuas tau raug, nws tuaj yeem siv los txiav txim siab tus qauv.
Qhov thib ob, cov kauj ruam tseem ceeb ntawm kev siv cov ntsuas acidity:
1. Qhib lub hwj chim hloov rau preheating.
2, kub them nyiaj.
3. Siv cov txheej txheem kev daws teeb meem rau qhov chaw.
4. Siv cov qauv kev daws teeb meem rau kev kho txoj kab nqes.
5. ph.
Thib peb, qhov tseem ceeb yuav tsum tau saib xyuas:
1. Cov iav electrode tshiab yuav tsum tau tsau rau hauv dej distilled thiab qhib rau 48h ua ntej siv.
2. Lub teeb phab ntsa ntawm lub iav electrode yog nyias heev, yog li nws yuav tsum tau tiv thaiv ob npaug thaum siv.
3. Cov tshuaj yuav tsum tau kuaj yuav tsum nyob rau ntawm qhov kub thiab txias raws li tus txheej txheem kev daws teeb meem, txwv tsis pub nws yuav tsum tau them rov qab thiab kho dua.
4 Thaum hloov cov tshuaj yuav tsum tau kuaj, cov electrode yuav tsum tau ntxuav thiab qhuav.
Tam sim no, feem ntau yog ob hom kev sib xyaw electrodes siv nyob rau hauv lub chaw kuaj: tag nrho nyob rau hauv thiab tsis-cuam tshuam, thiab tag nrho cov nyob rau hauv ib tug kuj tsawg, feem ntau yog tsim los ntawm txawv teb chaws lag luam. Ua ntej siv cov khoom siv hluav taws xob sib xyaw, ua ntej xyuas seb lub iav qhov muag puas tawg lossis tawg. Yog hais tias tsis yog, nws yog feem ntau txiav txim siab tias nws tuaj yeem siv tau thaum qhov chaw thiab txoj kab nqes cov nyees khawm tuaj yeem hloov kho rau tus nqi pH thaum ob-point calibration yog nqa tawm nrog pH tsis haum tshuaj, txwv tsis pub, lub electrode tuaj yeem qhib tau raws li kev qhia. phau ntawv.
Tom qab kev ntsuas tiav lawm, cov roj hmab yuav tsum tau rov qab thiab lub qhov me me yuav tsum tau muab kaw. Tom qab cov electrode ntxuav los ntawm cov dej distilled, nws yuav tsum tau tsau rau hauv 3mol / L potassium chloride tov kom cov electrode noob moist. Yog tias cov tshuaj tiv thaiv tau pom tias ploj lawm ua ntej siv electrode, nws yuav tsum tau tsau rau hauv 3mol / L potassium chloride tov rau ob peb teev kom cov electrode mus txog qhov ntsuas zoo. Hauv kev siv tswv yim, nws pom tias qee cov kws tshuaj ntsuam xyuas cov khoom siv hluav taws xob sib xyaw ua cov iav electrode thiab tsau rau hauv dej distilled ntev, uas yog qhov tsis raug. Qhov no yuav txo tau cov concentration ntawm potassium chloride tov nyob rau hauv cov electrode composite, uas yuav ua rau cov electrode insensitive teb thaum ntsuas thiab nws thiaj li ua rau cov ntaub ntawv ntsuas tsis raug. Yog li ntawd, cov khoom siv hluav taws xob yuav tsum tsis txhob muab tso rau hauv dej distilled ntev.
