Cov Qauv Qauv thiab Cov Haujlwm Ntawm Kev Ua Haujlwm rau Npaj Daim Duab Tshawb Xyuas Kev Kho Mob
Lub ntsuas lub ntsuas yuav tsum tsis tu ncua ntsuas kom ntseeg tau tias nws qhov kev ua kom zoo thiab raug raws li qhov yuav tsum tau ua. Yuav ua li cas calibrate lub ntsuas phott, lossis hauv lwm lo lus, yuav ua li cas txhawm rau txhawm rau txhawm rau cov ntsuas pa hluav taws xob acidity. Cov hauv qab no yog cov ntaub ntawv ua ke los ntawm tus kws sau ntawv. Cia wb saib ntawm kev ntsuas hluav taws xob thiab txoj kev ntev thiab kawm txog lawv ua ke.
Txheem txoj kev rau npaj lub ntsuas kev ntsuas hluav taws xob
1. PH4 PICKSASTER Hydrogen phthalate qauv daws:
Qhov hnyav hnyav 10.12G ntawm cov poov tshuaj hydrogen phthalate [Khc8H4O4] qhuav ntawm 115 ± 5 degree, yaj mus rau 1000ml nrog dej.
2. Ph7 phosphate txheem ntas (ph7.4:
Raug hnyav hnyav 4.303g ntawm anhydrous disodium hydrogen phosphate thiab 1.179 ntawm poov tshuaj died ntawm 115 ± 5 degree, yaj mus rau 1000ml nrog dej.
Cov ntaub ntawv ntxiv: Phosphate qauv daws teeb meem (pH 6.33g ntawm anhydogen phosphate thiab 3.38 teev rau}, ntxiv dej kom yaj thiab dilute rau 1000mL.
3. Ph9 borax txheem buffer daws:
Raug hnyav 3.80G ntawm Borax [NAXB4OHTHT · :2] (FORDETE, tso rau hauv lub raj mis polyethylene, thiab zam kom tsis txhob muaj pa roj carbon dioxide hauv huab cua).
Lub xov tooj phost yog siv los ntsuas tus nqi PHY ntawm kev daws teeb meem uas siv lub potentiometric txoj kev. Yog li no, hom ua haujlwm ntawm lub xov tooj ua haujlwm tsis yog tsuas yog los ntsuas tus nqi PHU ntawm kev daws teeb meem, tab sis kuj yog los ntsuas lub tshuab hluav taws xob ntawm lub roj teeb. PH, hauv Latin, yog cov lus luv rau lub pas dej hydrogeni, uas yog qhov kev ua haujlwm ntawm hydrogen ions hauv cov khoom. PH yog qhov tsis zoo logarithm ntawm lub concentration ntawm hydrogen ions.
