Dab tsi yog qhov kev daws teeb meem tsis haum rau pH meter? Dab tsi yog cov yam ntxwv?
Cov tshuaj pH tsis yog cov tshuaj uas ua kom cov pH ruaj khov. Yog hais tias ib qho me me ntawm cov kua qaub los yog cov hauv paus ntxiv rau cov tshuaj no, los yog ib qho me me ntawm cov kua qaub los yog lub hauv paus yog tsim los ntawm cov tshuaj tiv thaiv hauv cov tshuaj, nrog rau cov kua dej uas tsim nyog, pH tus nqi ntawm cov tshuaj no yog qhov ruaj khov. thiab tsis hloov, hom kev daws teeb meem no tuaj yeem tiv thaiv me me ntawm cov kua qaub lossis cov hauv paus lossis dilution, thiab ua rau tus nqi pH tsis yooj yim hloov yog hu ua pH tsis haum.
pH meter standard buffer tov muaj cov yam ntxwv hauv qab no:
(1) tus nqi pH ntawm cov qauv kev daws teeb meem yog paub thiab ua tiav qhov yuav tsum tau muaj tseeb;
(2) Tus nqi pH ntawm tus qauv kev daws teeb meem muaj qhov zoo rov ua dua thiab ruaj khov, nrog lub peev xwm loj dua, me me dilution tus nqi thiab me me kub coefficient;
(3) Kev npaj cov tshuaj yog yooj yim;
2, rau PH meter, pH buffer tov yog lub luag haujlwm tseem ceeb?
(1) pH ntsuas ua ntej calibration calibration pH meter
(2) siv los xyuas qhov tseeb ntawm pH meter, piv txwv li, tom qab ntsuas pH ntsuas pH nrog pH 6.86 thiab pH 4.00, pH electrode yuav muab tso rau hauv pH 9.18 tov. los xyuas seb qhov ntsuas qhov ntsuas qhov ntsuas thiab qhov pHs tus nqi ntawm cov qauv kev daws teeb meem zoo ib yam;
(3) Txheeb xyuas seb lub ntsuas pH puas yuav tsum tau rov ntsuas dua thaum ntsuas qhov tseeb. pH meters tej zaum yuav drift los yog hloov tom qab calibration thiab siv, yog li ntxig cov electrode rau hauv tus qauv tsis yog nyob ze rau cov tshuaj nyob rau hauv kev ntsuam xyuas ua ntej kuaj, thiab txiav txim seb nws yuav tsum tau recalibrated raws li qhov loj ntawm qhov yuam kev.
(4) Ntsuas qhov ua tau zoo ntawm pH electrode
3, Yuav ua li cas npaj pH txheem tsis tov?
Rau kev ntsuas pH dav dav, koj tuaj yeem siv cov pH tsis zoo reagents (tuaj yeem npaj tau 250ml), kev npaj cov tshuaj, koj yuav tsum siv dej deionised, thiab ua ntej boil rau 15 mus rau 30 feeb kom tshem tawm cov pa roj carbon dioxide. Txiav qhib lub hnab yas thiab ncuav cov reagent rau hauv lub beaker, siv cov dej uas tsim nyog ntawm deionised kom nws yaj thiab yaug lub hnab, ces ncuav rau hauv 250ml volumetric hwj, dilute nws mus rau lub teev thiab co zoo.
4, Yuav ua li cas khaws thiab siv cov tshuaj pH tsis raug.
Kev npaj cov tshuaj tsis haum, yuav tsum tau muab tso rau hauv lub khob iav los yog lub raj mis polyethylene (alkaline pH tsis xws li pH9.18, pH10.01, pH12.46, thiab lwm yam., yuav tsum tau muab tso rau hauv lub raj mis polyethylene) cap nruj nreem kaw nruj nreem rau hauv lub tub yees thaum qis. qhov kub thiab txias (5 ~ 10 degree) khaws cia, feem ntau siv tau li ntawm ob lub hlis, xws li turbidity, mildew lossis nag lossis daus tshwm sim xws li kev tshawb pom tsis tuaj yeem siv txuas ntxiv mus. Thaum siv, ob peb 50ml polyethylene vials yuav tsum tau npaj, cov tshuaj tsis nyob rau hauv lub vial yuav tsum tau nchuav rau hauv vials, thiab muab tso rau hauv qhov kub thiab txias rau 1 ~ 2 teev, thiab tom qab ntawd siv tom qab qhov kub thiab txias sib npaug. Tom qab siv, nws yuav tsum tsis txhob muab rov qab rau hauv lub vial kom tsis txhob muaj kab mob. Cov tshuaj tsis nyob hauv lub vial tuaj yeem siv tau li 2 mus rau 3 hnub nyob rau hauv qhov chaw nyob ntawm "10 degree", thiab peb qhov kev daws teeb meem ntawm pH7.00, pH6.86 thiab pH4.{{19} }} tuaj yeem siv tau rau lub sijhawm ntev, thiab pH tus nqi ntawm pH9.18 thiab pH10.01 tov tuaj yeem hloov tau yooj yim dua vim qhov nqus ntawm CO2 hauv huab cua.
