Yuav ua li cas mus cuag lub neej kev pab cuam ntawm pH meter electrodes
1. Xaiv cov tshuaj pH tsis raug
Cov tshuaj pH tsis yog cov tshuaj uas tswj hwm tus nqi pH ruaj khov hauv qhov xwm txheej 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 yuav nyob twj ywm. Cov tshuaj no uas tuaj yeem tiv thaiv qhov cuam tshuam ntawm cov kua qaub thiab alkali me me 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 cov kev daws teeb meem tsis siv feem ntau hauv cov khoom siv hauv teb chaws yog pH4.00, pH6.86, thiab pH9.18, koj tuaj yeem siv ib-point calibration, ob-point calibration, los yog peb. - point calibration. Feem ntau, pH ntsuas muaj kev xaiv. , nyob rau hauv ib txwm muaj, muaj tsawg kawg yog ob peb tus qauv buffer tov pab pawg los ntawm Tuam Tshoj, Nyiv, thiab Tebchaws Meskas lossis cov kev xaiv 1, 2, thiab 3.
⑵ Feem ntau siv los 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 electrodes rau hauv pH9.18 thiab pH4. Puas yog pH tus nqi tso tawm los ntawm lub 'meter' zoo ib yam li tus nqi pH ntawm cov qauv kev daws teeb meem?
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 tuaj yeem teb tau zoo rau H + ions hauv cov tshuaj tsuas yog nyob rau hauv cov dej noo tag nrho. . Nyob rau tib lub sijhawm, tom qab soaking lub iav electrode, lub peev xwm asymmetric tuaj yeem txo qis thiab ruaj khov. Feem ntau 3.3mol / L KCL tov yog siv, thiab lub sij hawm soaking feem ntau yog ntau tshaj 12 teev. Txawm li cas los xij, tsis txhob crystallization ntawm 3.3mol / L KCL tov. Cov khoom siv lead ua tuaj yeem ntxuav nrog dej distilled thiab tsis tuaj yeem muab pov tseg nrog lwm cov cuab yeej.
3. Kev ceev faj rau kev siv cov khoom sib xyaw electrode ntawm pH meter
① Txheeb xyuas qhov muag hluav taws xob ua ntej kuaj. Yuav tsum tsis muaj npuas nyob rau pem hauv ntej ntawm lub teeb. Yog tias muaj npuas, co lawv tawm nrog lub zog me ntsis.
②Tom qab cov electrode tau muab tshem tawm ntawm cov dej so, nws tuaj yeem ntxuav hauv qib peb dej. Tsis txhob so lub teeb nrog daim ntawv phuam, txwv tsis pub tus nqi electrostatic induction yuav raug xa mus rau iav zaj duab xis, uas yuav ua rau lub sijhawm ntev rau lub peev xwm ruaj khov. Koj tseem tuaj yeem siv cov ntsuas ntsuas ncaj qha. Yaug lub electrode.
③Insert pH composite electrode rau hauv cov tshuaj uas raug kuaj tsawg kawg yog 1CM hauv qab no. Do nws ob peb zaug ua ntej kuaj thiab tom qab ntawd muab tso rau. Qhov no yuav ua kom cov lus teb ceev ntawm electrode thiab stabilize tus nqi ntsuas.
