Vim li cas thiaj yuav tsum tau dej pH meter electrode? Yuav ua li cas ntub dej kom zoo?
Lub pH electrode yuav tsum tau soaked ua ntej siv, vim hais tias lub pH noob yog ib tug tshwj xeeb iav membrane nrog ib tug nyias hydrated gel txheej nyob rau saum npoo ntawm iav daim nyias nyias, uas yuav teb tau zoo rau H ntxiv ions nyob rau hauv cov tshuaj tsuas yog thaum nws yog tag nrho ntub. . Nyob rau tib lub sijhawm, cov iav electrode yog tsau, uas tuaj yeem txo qhov peev xwm asymmetric thiab zoo li ruaj khov.
Lub pH iav electrode 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 sij hawm ntub dej yog 8 teev mus rau 24 teev lossis ntev dua, nyob ntawm qhov tuab ntawm lub teeb iav daim nyias nyias thiab kev laus ntawm cov electrode. Nyob rau tib lub sijhawm, cov kua sib txuas ntawm cov khoom siv electrode kuj yuav tsum tau ntub dej. Vim hais tias yog cov kua hleb dries, lub peev xwm ntawm cov kua hlws ris yuav nce los yog tsis ruaj khov. Cov dej ntub dej ntawm cov khoom siv electrode yuav tsum ua raws li cov lus qhia sab nraud ntawm cov khoom siv electrode, uas yog, 3.3mol / L KCl tov los yog saturated KCl tov, thiab lub sij hawm soaking feem ntau yog ob peb teev yuav ua.
Yog li ntawd, rau pH composite electrode, nws yuav tsum tau immersed nyob rau hauv lub pH4 tsis haum tshuaj uas muaj KCl, thiaj li hais tias nws muaj peev xwm ua rau lub iav qhov muag teev thiab cov kua hlws ris tib lub sij hawm. Kev saib xyuas tshwj xeeb yuav tsum tau them rau ntawm no, vim hais tias yav dhau los, tib neeg tau siv ib qho pH iav electrode kom muab tso rau hauv dej deionized lossis pH4 tsis siv tshuaj. Qhov txiaj ntsig ncaj qha ntawm kev siv txoj kev ntub dej no thaum siv pH sib xyaw electrode tom qab yog qhov ua tau zoo ntawm ib qho pH iav electrode yuav raug txo. Ib qho pH zoo electrode ua ib qho electrode nrog cov lus teb qeeb thiab qhov tsis zoo, thiab lub sijhawm immersion ntev dua, qhov ua tau zoo dua, vim tias tom qab lub sijhawm ntev immersion, KCl concentration hauv cov kua hlws ris (xws li hauv cov xuab zeb core) muaj. raug txo qis heev, kom cov kua dej sib txuas muaj peev xwm nce thiab ua tsis ruaj khov. Tau kawg, cov electrodes yuav rov qab los nrog ob peb teev ntawm rov qab so hauv cov kua dej kom raug.
Tsis tas li ntawd, pH electrode yuav tsum tsis txhob ntub rau hauv nruab nrab lossis alkaline tsis daws teeb meem. Kev tso dej mus ntev hauv cov kev daws teeb meem no yuav ua rau pH iav daim nyias nyias teb sluggishly. Kev npaj cov pH electrode soaking kom raug: nqa ib pob ntawm pH4.00 tsis (250ml), yaj nyob rau hauv 250ml ntawm cov dej ntshiab, ntxiv 56 grams ntawm analytically ntshiab KCl, cua sov kom zoo, thiab do kom txog thaum yaj tag. Yuav ua li cas ntxuav pH electrode? Tom qab lub qhov muag teev thiab cov kua hlws ris muaj kuab paug, lawv yuav tsum tau muab ntxuav nrog cov kuab tshuaj hauv qab no, tom qab ntawd ntxuav nrog dej deionized kom tshem tawm cov kuab tshuaj, thiab tom qab ntawd muab tso rau hauv cov dej ntub dej kom qhib cov electrodes.
