Kev ua haujlwm zoo tuaj yeem tiv thaiv pH electrode
1. Kev xaiv kom raug ntawm cov tshuaj pH tsis haum
Cov tshuaj pH tsis yog cov tshuaj uas tswj cov pH ruaj khov nyob rau hauv ib txwm muaj. Txawm hais tias ib qho me me ntawm cov kua qaub lossis alkali ntxiv rau cov tshuaj no, pH tus nqi ntawm cov tshuaj no yog qhov qub. Cov tshuaj no uas tuaj yeem tiv taus me me ntawm acid-base cuam tshuam thiab ua kom tus nqi pH tsis tu ncua yog hu ua pH tsis haum.
⑴ Lub ntsuas pH yuav tsum tau ntsuas tsawg kawg ib zaug ib hnub ua ntej siv. Piv txwv li, yog tias koj siv cov kev daws teeb meem tsis siv feem ntau siv hauv teb chaws tus qauv textiles, pH4.00, pH6.86, thiab pH9.18, koj tuaj yeem siv ib-point calibration, ob-point calibration, thiab peb-point calibration. Feem ntau, pH meters muaj kev xaiv, nyob rau hauv ib txwm muaj xwm txheej, muaj tsawg kawg yog ob peb tus qauv tsis haum pab pawg los ntawm Tuam Tshoj, Nyiv, thiab Tebchaws Meskas lossis cov kev xaiv ntawm 1, 2, thiab 3.
(2) Nws feem ntau yog siv los ntsuas lossis ntsuas pH ntsuas. Piv txwv li, cov kev daws teeb meem tsis siv feem ntau hauv cov khoom siv hauv teb chaws yog pH4.00 thiab pH6.86. Tom qab ntsuas pH ntsuas pH, ntxig pH electrode rau hauv qhov tsis haum ntawm pH9.18 thiab pH4.
2. Thaum tsis siv, pH electrode soaking txoj kev
Lub pH electrode yuav tsum tau ntub dej ua ntej siv. Lub pH qhov muag teev yog ib qho tshwj xeeb iav daim nyias nyias nrog nyias hydrated gel txheej nyob rau saum npoo ntawm iav daim nyias nyias. Nws tsuas tuaj yeem teb tau zoo rau H ntxiv ions hauv kev daws teeb meem raws li cov av noo txaus. . Nyob rau tib lub sijhawm, cov iav electrode yog tsau, uas tuaj yeem txo qhov peev xwm asymmetric thiab zoo li ruaj khov. Feem ntau siv 3.3mol / L KCL tov, lub sij hawm soaking feem ntau yog ntau tshaj 12 teev, tab sis tsis txhob crystallization ntawm 3.3mol / L KCL tov, lub crystallization tuaj yeem ntxuav nrog dej distilled, thiab tsis tuaj yeem muab tshem tawm nrog lwm cov cuab yeej, thiab lwm yam. .
3. Kev ceev faj rau kev siv cov khoom sib xyaw electrode ntawm pH meter
① Tshawb xyuas lub teeb hluav taws xob ua ntej kev sim. Yuav tsum tsis muaj cua npuas nyob rau pem hauv ntej ntawm lub teeb. Yog tias muaj cua npuas, co lawv tawm nrog lub zog me ntsis.
② Tom qab cov electrode raug tshem tawm ntawm cov dej ntub dej, nws tuaj yeem ntxuav hauv cov dej qib thib peb, thiab lub teeb yuav tsum tsis txhob muab cov ntaub so ntswg, txwv tsis pub, vim electrostatic induction, tus nqi yuav raug xa mus rau lub khob. zaj duab xis, uas yuav ncua lub sij hawm kom muaj peev xwm stabilization, thiab cov kev ntsuas ntsuas kuj yuav siv tau ncaj qha Rhaub cov electrodes.
③ Lub pH compound electrode yog muab tso rau hauv cov tshuaj yuav tsum tau kuaj tsawg kawg yog 1CM hauv qab no. Ua ntej qhov kev xeem, do nws ob peb zaug thiab tom qab ntawd muab tso rau statically. Qhov no yuav ua kom cov lus teb ceev ntawm cov electrode thiab stabilize tus nqi ntsuas.
