Puas muaj qhov yuam kev loj yog tias lub ntsuas pH siv ncaj qha yam tsis muaj calibration?
1. Ib-point calibration ntawm acidimeter
Txhua tus pH ntsuas yuav tsum tau ntsuas nrog cov qauv pH ua ntej nws tuaj yeem ntsuas pH tus nqi ntawm tus qauv. Rau cov qauv nrog kev ntsuas qhov tseeb hauv qab no {{{0}}}.1 pH, lub ntsuas ntsuas tuaj yeem hloov kho siv txoj kev raug ib qho. Feem ntau, pH 6.86 lossis pH 7 yog siv. 00 standard buffer. Qee cov cuab yeej muaj qhov tseeb ntawm tsuas yog 0.2pH lossis 0.lpH, yog li lub ntsuas tsuas muaj ib qho kev hloov kho qhov rooj. Cov kauj ruam tshwj xeeb yog raws li nram no:
(1) Ntsuas qhov ntsuas kub ntawm cov txheej txheem kev daws teeb meem, saib lub rooj los txiav txim siab pHs tus nqi ntawm qhov ntsuas kub no, thiab kho qhov kub ntawm qhov kub thiab txias rau qhov kub no.
(2) Yaug cov electrode nrog dej ntshiab thiab tig kom qhuav.
(3) Muab cov electrode tso rau hauv cov tshuaj tsis haum thiab co nws, tom qab ntawd muab tso rau hauv. Tom qab kev nyeem ntawv ruaj khov, kho qhov chaw qhov rooj kom lub ntsuas ntsuas pH tus nqi ntawm cov qauv kev daws teeb meem.
(4) Tshem tawm cov electrode, yaug thiab tig kom qhuav. (5) Ntsuas tus qauv ntsuas kub thiab kho cov pH ntsuas kub ntsuas qhov ntsuas kub rau qhov ntsuas kub
2. Ob-point calibration ntawm acidometer
Rau precision-qib pH meters, ntxiv rau ¨positioning¨ thiab ¨temperature them nyiaj hloov kho, kuj tseem muaj kev hloov kho electrode ¨slope¨, uas yuav tsum tau calibration nrog ob tus qauv buffers. Feem ntau, pH 6. los yog pH 9.18 thiab pHI 0. Kev kho. Cov kauj ruam tshwj xeeb yog:
(1) Ntxuav thiab qhuav cov electrode, muab tso rau hauv pH6. Tom qab qhov taw qhia tus nqi ruaj khov, kho qhov chaw qhov rooj kom qhov ntsuas qhov ntsuas tus nqi yog pHs tus nqi ntawm cov qauv kev daws teeb meem.
(2) Tshem tawm cov electrode, ntxuav nws, tig nws qhuav, thiab muab tso rau hauv cov txheej txheem thib ob. Tom qab qhov taw qhia tus nqi ruaj khov, kho txoj kab nqes pob qhov ntsuas ntawm qhov ntsuas kom qhov ntsuas ntsuas tus nqi yog pHs tus nqi ntawm cov txheej txheem thib ob.
(3) Tshem tawm cov electrode, ntxuav nws thiab tig nws kom qhuav, thiab tom qab ntawd muab tso rau hauv pH6.86 lossis pH7.00 tsis muaj tshuaj. Yog tias qhov yuam kev dhau 0.02pH, rov ua cov kauj ruam (1) thiab (2) kom txog thaum pH raug tso tawm tuaj yeem pom hauv ob qho kev daws teeb meem yam tsis tau kho lub pob qhov rooj.
(4) Tshem tawm cov electrode thiab tig nws qhuav, kho pH kub them pob qhov rooj rau qhov ntsuas kub ntawm cov qauv tshuaj, raus cov electrode hauv cov qauv tshuaj, co nws thiab tso nws kom txog thaum kev nyeem ntawv ruaj khov.
3. Qhov thib peb point calibration ntawm pH meter
Txawm li cas los xij ntawm pH meter nws yog, qhov taw tes pH {{0}} yuav tsum tau ntsuas, thiab thaum ntsuas ntawm ob lub ntsiab lus, qhov taw tes pH =7 yuav tsum tau ntsuas ua ntej. Thaum ua calibration, pib ntawm 7.0. Cov txheej txheem xaiv cov tshuaj muaj feem xyuam nrog tus nqi pH ntawm cov tshuaj yuav tsum tau ntsuas, kom pH tus nqi ntawm cov tshuaj tuaj yeem poob rau hauv qhov ntsuas pH ntau. Feem ntau, ob lub ntsiab lus tuaj yeem ua tau raws li qhov yuav tsum tau ua. Yog tias qhov kev xav tau siab heev, lub ntsiab lus thib peb yuav raug txiav txim siab. Qee cov twj paj nruag tuaj yeem ntsuas peb lub ntsiab lus thiab muaj cov kev xaiv xaiv. Koj tuaj yeem siv hom no ncaj qha. Rau qee qhov, ob-point thiab ob-point proofreading feem ntau yog siv, uas yog, proofreading ob zaug.
