Calibration ntawm PH meter|Acidimeter siv hauv chav kuaj:
1, feem ntau siv PH meter ntsuas ntsuas ntsuas, txoj kab nqes ntawm qhov ntsuas yuav tsum tau kho kom siab tshaj plaws, thiab muab tso rau ntawm lub electrode rau sab sauv ntawm cov roj hmab ntsaws, kom cov qhov me me raug nthuav tawm, txwv tsis pub nyob rau hauv calibration, nws yuav ua rau lub siab tsis zoo, av nkos rau cov kev daws teeb meem tsis tuaj yeem hloov pauv ion ib txwm, nws yuav ua rau cov ntaub ntawv ntsuas tsis raug.
Tshem cov electrode tawm ntawm lub beaker uas muaj dej distilled, thiab siv cov ntawv lim kom nqus cov dej distilled seem ntawm cov electrode. Tom qab ntawd muab cov electrode tso rau hauv lub beaker uas muaj cov phosphate basin sib xyaw, tos ntev dua 15 min, thiab tom qab ntawd kho cov pob qhov rooj ntawm qhov ntsuas kom lub ntsuas ntsuas 6.86pH, uas yog thawj zaug teeb tsa. reference point rau qhov ntsuas. Teem lub ntsiab lus zoo tom qab lub tshuab hluav taws xob los ntawm lub beaker uas muaj cov tshuaj phosphoric acid tov tawm, nrog dej distilled los ntxuav cov electrode, thiab muab tso rau hauv lub beaker uas muaj dej distilled, tos li 3 min, kom cov seem seem ntawm cov phosphoric tov. kua qaub yaj.
2. Tshem cov electrode tawm ntawm lub beaker nrog dej distilled tom qab thiab qhuav cov dej distilled seem ntawm cov electrode nrog cov ntawv lim. Tom qab ntawd muab cov electrode tso rau hauv cov tshuaj uas muaj poov tshuaj hydrogen phthalate lossis borax, tos ntev dua 15 feeb, saib seb lub ntsuas ntsuas yog 4.00 lossis 9.18 pH. Yog tias tsis yog, peb yuav tsum kho cov pob qhov nqes hav ntawm lub ntsuas, kom lub ntsuas ntsuas 4.00 lossis 9.18 pH, uas feem ntau siv ob-point calibration. Yog tias koj xav tau peb-point calibration, lwm txoj kev daws teeb meem, raws li cov kauj ruam saum toj no thiab ua haujlwm ntau dua ib zaug ntawm kab. Qhov no yog txoj kev calibration ntawm acidity meter.
3, tom qab kev kho, tom qab ntsaws rov qab rau hauv cov roj hmab ntsaws, yog tias tsis siv ib ntus, nco ntsoov nruab lub tshuab hluav taws xob hauv lub tes tsho tiv thaiv ntawm cov tshuaj saturated kom cov electrode ntub dej, uas tuaj yeem txuas lub neej ntawm electrode thiab txo cov electrode asymmetrical. peev xwm. Cov hluav taws xob muaj lub sijhawm siv, thiab tsis muaj zog, yog li ntawd, txhua qhov chaw kuaj mob yuav tsum tau hloov cov electrode feem ntau, tsis txhob xav tias kev siv cov electrode tsis zoo rau kev hloov.
4, cov khoom siv hluav taws xob ua ntej siv, ua ntej kuaj lub iav qhov muag seb puas muaj cov kab nrib pleb, tawg, yog tias tsis yog, nrog cov tshuaj pH tsis haum rau ob lub ntsiab lus calibration, qhov chaw thiab txoj kab nqes pob qhov rooj tuaj yeem hloov kho rau tus nqi pH, feem ntau yog txiav txim siab. tuaj yeem siv tau, txwv tsis pub koj tuaj yeem siv cov electrode raws li cov lus qhia rau kev kho kom ua haujlwm. Txoj kev ua kom muaj nyob rau hauv 4% hydrogen fluoride tov nyob rau hauv txog 3 ~ 5 s, tshem tawm cov distilled dej rau yaug huv si; ces nyob rau hauv 0.1 mol / L ntawm potentiometric acid tov soaked rau ob peb teev, yaug nrog dej distilled, thiab ces calibration. Rau cov tsis-kaw puas electrode, yog tias cov tshuaj yog "1/3", nws yog ib qhov tsim nyog los ntxiv cov tshuaj siv sab nraud, piv txwv li 3 mol / L potassium fluoride tov. Yog tias cov tshuaj poov tshuaj fluoride tshaj qhov chaw ntawm lub qhov me me, co tawm cov tshuaj poov tshuaj fluoride ntau dhau thiab xyuas seb puas muaj cov pa npuas hauv cov tshuaj, yog tias muaj huab cua npuas, peb yuav tsum flick lub electrode kom tshem tawm cov pa npuas tag. . Kom tsis txhob ua rau cov ntaub ntawv ntsuas tsis raug.
5, cwj mem PH meter calibration method:
Test cwj mem electrode immersed nyob rau hauv PH nqi ntawm 6. nrog ib tug me me ntswj ntsia hlau los kho lub calibration potentiometer kom txog rau thaum tus nqi zaub thiab cov txheej txheem buffer tov nyob rau hauv lub ambient kub ntawm PH nqi match; electrode tso rau hauv PH4.01 ntawm phosphorus ntawm poov tshuaj hydrogen dicarboxylate los yog PH9.18 ntawm tus qauv buffer tov ntawm borax; cov zaub tus nqi ntawm cov tshuaj tsis haum nrog PH tus nqi piv rau cov nqi tso saib yuav tsum yog nyob rau hauv qhov kev tso tawm tus nqi yuav tsum nyob rau hauv qhov kev tso cai ntawm qhov yuam kev thaum piv nrog tus nqi pH ntawm cov tshuaj tsis haum.
