Vim li cas PH electrode yuav tsum tau ntub dej? Yuav ua li cas ntub cov PH composite electrode kom raug?
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 lub iav membrane. Nws tsuas tuaj yeem muaj kev sib cuam tshuam zoo nrog cov hydrogen ions hauv cov tshuaj nyob rau hauv cov dej noo tag nrho. teb. Nyob rau tib lub sijhawm, lub peev xwm asymmetric ntawm iav electrode tuaj yeem txo qis thiab ruaj khov tom qab soaking. pH iav electrodes feem ntau tuaj yeem tsau rau hauv dej distilled lossis pH4 tsis. Feem ntau nws yog qhov zoo dua los siv pH 4 tsis, thiab lub sij hawm ntub dej yog 8 teev mus rau 24 teev lossis ntev dua, nyob ntawm qhov tuab ntawm lub qhov muag teev iav thiab qhov 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 hlws ris dries, cov kua hlws ris tej zaum yuav nce los yog tsis ruaj khov. Cov kua dej ntawm cov khoom siv electrode yuav tsum ua raws li cov kua siv sab nraud ntawm cov khoom siv electrode, uas yog, 3.3mol / L KCL tov lossis saturated KCL tov. Lub sij hawm soaking Feem ntau ob peb teev yog txaus.
Yog li ntawd, pH composite electrode yuav tsum tau tsau rau hauv PH4 tsis muaj KCL kom nws tuaj yeem ua rau lub khob iav thiab cov kua dej sib txuas tib lub sijhawm. Kev saib xyuas tshwj xeeb yuav tsum tau them rau ntawm no vim tias yav dhau los, tib neeg siv los ntub ib qho pH iav electrodes hauv dej deionized los yog pH4 tsis. Tom qab ntawd, lawv tseem siv txoj kev ntub dej no thaum siv pH sib xyaw electrodes. Qhov txiaj ntsig ncaj qha ntawm txoj kev ntub dej tsis zoo no yog tig lub pH sib xyaw electrode nrog kev ua haujlwm zoo rau hauv cov khoom siv hluav taws xob nrog cov lus teb qeeb thiab qhov tseeb tsis zoo, thiab lub sijhawm ntub dej ntev dua, qhov ua tau zoo dua, vim tias tom qab ntub dej ntev, cov kua dej sib cuag. KCL concentration nyob rau hauv ciam teb (xws li hauv cov xuab zeb core) tau txo qis heev, ua rau cov kua hlws ris muaj peev xwm nce thiab tsis ruaj khov. Tau kawg, cov electrode 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 electrode tsis tuaj yeem muab tso rau hauv nruab nrab lossis alkaline tsis daws teeb meem. Kev nkag mus rau lub sijhawm ntev hauv cov kev daws teeb meem no yuav ua rau PH iav membrane teb qeeb. Kev npaj cov pH electrode soaking kom raug: Siv ib pob ntawm pH 4.00 tsis (250ml), yaj nyob rau hauv 250ml dej ntshiab, ces ntxiv 56g ntawm analytical qib KCL, cua sov kom tsim nyog, thiab do kom txog thaum yaj tag. Txhawm rau ua kom cov pH sib xyaw electrode yooj yim dua rau kev siv, qee qhov pH sib xyaw electrodes txawv teb chaws thiab qee cov khoom siv hluav taws xob hauv tsev tau nruab nrog lub hnab yas kaw rau ntawm lub taub hau ntawm pH sib xyaw electrode, uas muaj cov electrode soaking kua. Lub taub hau electrode yog tsau rau hauv nws ntev thiab rub tawm thaum siv. Tsuas yog ntxuav nws, yooj yim heev. Txoj kev khaws cia no tsis yog yooj yim xwb tab sis kuj tseem muaj txiaj ntsig zoo hauv kev txuas lub neej ntawm electrode. Tsuas yog them sai sai rau cov kua dej hauv cov yas vial kom tsis txhob kis kab mob thiab hloov nws.
