Dab tsi yog cov tshuaj tiv thaiv electrode rau ph meters?
Lub pH meter yog ib qho cuab yeej siv los txiav txim siab txog qib pH. Lub pH meter ua haujlwm ntawm lub roj teeb galvanic. Nernst txoj cai, uas yog nyob ntawm ob qho tib si cov yam ntxwv ntawm cov electrode hauv nqe lus nug thiab qhov concentration ntawm hydrogen ions hauv cov tshuaj, tswj cov electromotive quab yuam ntawm ob lub electrodes ntawm lub roj teeb galvanic. Lub electromotive quab yuam ntawm thawj lub roj teeb thiab cov hydrogen ion concentration muaj kev sib raug zoo, thiab tus nqi pH yog sib npaug rau qhov tsis zoo logarithm ntawm hydrogen ion concentration. Ib qho cuab yeej tshuaj ntsuam uas nquag siv hauv kev ua liaj ua teb, kev tiv thaiv ib puag ncig, thiab kev lag luam yog pH meter.
Cov tshuaj tiv thaiv ph meter electrode yog ib hom kua uas siv los ua kom lub ph meter electrode muaj kev nyab xeeb. Nws feem ntau yog ua los ntawm poov tshuaj chloride thiab lwm yam tshuaj tua kab mob. Tag nrho cov electrodes siv hauv chav kuaj yog cov khoom siv hluav taws xob sib xyaw, uas muaj cov txiaj ntsig ntawm kev siv yooj yim, tsis cuam tshuam los ntawm oxidizing lossis txo cov neeg ua haujlwm, thiab muaj qhov sib npaug nrawm kom tswj tau qhov sib txawv ntawm hydraulic siab sib txawv ntawm cov tshuaj potassium chloride hauv cov electrode, tshem tawm lub tes tsho roj hmab ntawm qhov qis kawg thiab cov electrode filling chaw nres nkoj thaum siv.Nws yuav tsum tau muab sau tseg tias ob peb cov electrodes txawv teb chaws, xws li Mettler-Toledo, Sartorius, thiab Hach, siv 3mol / L KCL hauv lawv cov kev tiv thaiv kev daws teeb meem, thiab pH. 'meter' tiv thaiv kev daws teeb meem feem ntau siv cov tshuaj KCL saturated. Koj yuav tsum nqa cov nyiaj ions, yog li nyeem cov lus qhia kom zoo ua ntej koj pib, xyuas cov electrolyte lub xeev, thiab txiav txim siab yuav ua li cas mus ntxiv.
