Vim li cas pH electrodes yuav tsum tau raus
Lub pH electrode yuav tsum tau soaked ua ntej siv vim hais tias lub pH noob yog ib tug tshwj xeeb iav zaj duab xis nrog ib tug nyias hydrated gel txheej nyob rau saum npoo ntawm iav zaj duab xis, uas teb zoo rau H ions nyob rau hauv kev daws tsuas yog nyob rau hauv txaus ntub dej. Nyob rau tib lub sijhawm, lub iav electrode tuaj yeem muab tso rau hauv kom lub peev xwm asymmetric txo qis thiab ruaj khov.
pH iav electrodes feem ntau tuaj yeem tsau rau hauv dej distilled lossis pH4 tsis muaj tshuaj. Feem ntau nws yog qhov zoo dua los siv cov tshuaj pH4 tsis zoo, thiab lub sijhawm ntub dej yog los ntawm 8 teev mus rau 24 teev lossis ntev dua, nyob ntawm qhov tuab ntawm lub teeb iav zaj duab xis thiab qib ntawm kev laus ntawm electrode.
Tsis tas li ntawd, cov kua hlws ris ntawm cov siv electrode yuav tsum tau tsau. Vim hais tias yog cov kua hlws ris dries, nws yuav ua rau lub peev xwm ntawm cov kua hlws ris nce los yog tsis ruaj khov. Cov kua dej ntawm cov khoom siv electrode yuav tsum yog tib yam li cov lus siv sab nraud ntawm cov khoom siv electrode, piv txwv li, 3.3mol / L KCL tov lossis saturated KCL tov, thiab lub sij hawm soaking feem ntau yog ob peb teev.
Yog immersion ntawm pH composite electrode
Soak hauv pH4 tsis muaj tshuaj uas muaj KCL kom nws ua haujlwm ntawm ob lub khob iav thiab cov kua dej sib txuas. Kev saib xyuas tshwj xeeb yuav tsum tau them rau ntawm no, vim tias yav dhau los, tib neeg tau siv los so rau ib qho pH iav electrode nrog dej deionised lossis pH4 tsis muaj tshuaj, thiab tom qab ntawd, thaum siv cov pH sib xyaw electrode, lawv tseem siv cov txheej txheem so, thiab txawm nyob rau hauv phau ntawv qhia ntawm qee qhov tsis raug pH sib xyaw electrodes, cov lus qhia tsis raug kuj tau ua.
Qhov txiaj ntsig ncaj qha ntawm txoj kev ntub dej tsis zoo no yog ua kom muaj kev ua tau zoo ntawm pH sib xyaw electrode rau hauv cov lus teb qeeb, qhov tsis zoo ntawm cov electrode, thiab lub sij hawm ntub dej ntev dua, qhov kev ua tau zoo dua, vim tias tom qab lub sij hawm ntev ntawm soaking, Cov kua dej sib txuas ntawm sab hauv (xws li cov xuab zeb hauv cov) KCL concentration tau txo qis heev, yog li cov kua hlws ris muaj peev xwm nce thiab tsis ruaj khov. Tau kawg, cov electrode tseem yuav rov zoo dua yog tias nws rov qab los rau hauv cov kua dej kom raug rau ob peb teev.
Tsis tas li ntawd, pH electrodes yuav tsum tsis txhob muab tso rau hauv nruab nrab lossis alkaline tsis daws teeb meem; Ntev immersion nyob rau hauv xws li kev daws yuav dull cov lus teb ntawm pH iav daim nyias nyias. Kev npaj ntawm qhov tseeb pH electrode soaking tov: nqa ib pob ntawv ntawm pH4.00 tsis (250ml), yaj nyob rau hauv 250ml ntawm dej ntshiab, ces ntxiv 56g ntawm analytically ntshiab KCl, cua sov kom tsim nyog thiab do kom txog thaum nws. yog yaj tag.
