PH 'meter' PH electrode standard tsis sib tov piv
pH electrode, tseem hu ua pH sojntsuam, pH sensor, lus Askiv lub npe pH electrode lossis pH sensor, yog ib feem ntawm PH meter nyob rau hauv kev sib cuag nrog cov khoom ntsuas, siv los ntsuas lub peev xwm electrode.
PH meter PH electrode ua ke nrog qhov yuav tsum tau kho qhov ntsuas nrog tus qauv tsis, thiab nyob rau hauv kev teeb tsa ntawm kev teeb tsa ntawm cov khoom siv cache, koj yuav tsum siv tus qauv tsis sib piv kom ntseeg tau qhov tseeb ntawm qhov ntsuas. Ntawm no peb tuaj yeem nkag siab txog PH meter PH electrode calibration ntawm tus qauv tsis sib xyaw sib piv:
(1) Potassium oxalate standard buffer Precision hnyav hauv 54 ± 3 degree qhuav 4 ~ 5 teev ntawm potassium oxalate [KH3 (C2O4) 2-2H2O] 12.61g, ntxiv dej kom soluble thiab dilute rau 1000ml.
(2) Potassium hydrogen phthalate standard buffer Precision hnyav ntawm poov tshuaj hydrogen phthalate [KHC8H4O4] 10.12g qhuav ntawm 115 ± 5 degree rau 2 ~ 3 teev, ntxiv dej kom yaj thiab dilute mus rau 1000ml.
(3) Phosphate standard buffer (pH 6.8) Precision hnyav ntawm anhydrous disodium hydrogen phosphate 3.533g qhuav ntawm 115 ± 5 degree rau 2 ~ 3 teev thiab poov tshuaj dihydrogen phosphate 3.387g, ntxiv dej kom yaj thiab dilute rau 1000ml.
(4) phosphate standard buffer (pH 7.4) Precision hnyav hauv 115 ± 5 degree qhuav 2 ~ 3 teev ntawm anhydrous disodium hydrogen phosphate 4.303g thiab potassium dihydrogen phosphate 1.179g, ntxiv dej kom yaj thiab dilute rau 1000ml.
(5) Borax standard buffer Precision hnyav borax [Na2B4O7-10H2O] 3.80g (Ceeb toom: tsis txhob huab cua), ntxiv dej kom yaj thiab dilute rau 1000ml, muab tso rau hauv polyethylene yas fwj, nruj corked, tsis txhob sib cuag nrog carbon dioxide hauv huab cua.
