PH meter electrode thiab nws cov teeb meem tshwm sim
PH electrode, PH meter electrode hom, PH electrode qauv, PH electrode hom, PH electrode siv, dab tsi yog cov teeb meem ntawm PH electrode thiab lawv cov kev daws teeb meem?
1. Dab tsi yog pH qhia txog electrode?
Cov electrode uas teb rau cov kev ua ntawm hydrogen ions nyob rau hauv cov tshuaj thiab cov electrode tej zaum yuav hloov raws li ib tug hu ua pH qhia electrode los yog pH ntsuas electrode. Muaj ntau ntau hom pH qhia txog electrodes, xws li hydrogen electrode, antimony electrode thiab iav electrode, tab sis feem ntau siv ib qho yog iav electrode. Cov iav electrode yog tsim los ntawm iav strut thiab hydrogen ion-sensitive iav daim nyias nyias uas muaj qhov tshwj xeeb muaj pes tsawg leeg. Lub iav daim nyias nyias yog feem ntau nyob rau hauv cov duab ntawm lub teeb. Lub teeb tau sau nrog cov tshuaj siv sab hauv, muab tso rau hauv ib qho kev siv hluav taws xob sab hauv (feem ntau yog nyiaj / nyiaj chloride electrode), kaw nrog lub hau electrode coj tawm cov xov hlau, thiab haum nrog lub qhov (socket) los ua pH ntsuas. electrode. Ib qho pH qhia electrode tsis tuaj yeem ntsuas, nws yuav tsum ntsuas ua ke nrog cov khoom siv electrode.
2. Dab tsi yog qhov siv electrode?
Ib qho hluav taws xob uas tsis teb rau cov dej num ntawm hydrogen ions hauv kev daws thiab muaj lub peev xwm paub thiab tsis tu ncua electrode yog hu ua siv electrode. Muaj ntau yam siv electrodes xws li mercurous sulfate electrode, calomel electrode thiab silver / silver chloride electrode. Feem ntau siv yog calomel electrode thiab nyiaj / silver chloride electrode. Lub luag haujlwm ntawm cov khoom siv hluav taws xob hauv kev ntsuas roj teeb yog los muab thiab tuav lub peev xwm siv tau ruaj khov. Yog li ntawd, qhov yuav tsum tau ua rau cov khoom siv electrode yog qhov ruaj khov thiab muaj peev xwm rov tsim tau, me me kub coefficient, thiab me me polarization muaj peev xwm thaum tam sim no dhau mus.
3. Dab tsi yog pH electrode?
Ib qho hluav taws xob uas sib txuas nrog pH iav electrode thiab siv hluav taws xob siv hu ua pH electrode. Cov ntaub ntawv nrog lub plhaub yas hu ua yas plhaub pH sib xyaw electrode. Ib qho nrog iav plhaub yog hu ua iav pH sib xyaw electrode. Qhov txiaj ntsig loj tshaj plaws ntawm cov khoom siv hluav taws xob sib xyaw yog tias nws muab ob qho tib si rau hauv ib qho thiab siv tau yooj yim. Cov qauv ntawm pH compound electrode yog tsim los ntawm electrode noob, iav kev txhawb nqa pas nrig, sab hauv siv electrode, sab hauv siv tshuaj, plhaub, sab nraud siv electrode, sab nraud siv tshuaj, kua hlws ris, electrode cap, electrode hlau, socket thiab lwm yam.
(1) Electrode noob: Nws yog ua los ntawm molten lithium iav nrog hydrogen muaj nuj nqi thiab yog spherical nyob rau hauv cov duab, nrog ib tug zaj duab xis thickness ntawm txog 0.1-0.2 hli thiab ib tug kuj muaj nuj nqis ntawm<250 megohms="">
⑵ Lub raj mis txhawb nqa: Nws yog lub iav raj lub cev uas txhawb nqa lub teeb hluav taws xob. Nws yog ua los ntawm cov iav txhuas nrog cov hluav taws xob zoo heev, thiab nws cov coefficient expansion yuav tsum ua raws li cov iav electrode teeb.
(3) Sab hauv siv electrode: Nws yog nyiaj / nyiaj chloride electrode, lub luag haujlwm tseem ceeb yog coj tawm lub peev xwm electrode, uas yuav tsum muaj peev xwm ruaj khov thiab me me qhov kub thiab txias coefficient.
(4) Cov tshuaj siv sab hauv: Cov tshuaj siv sab hauv nrog xoom lub peev xwm ntawm 7pH yog cov tshuaj sib xyaw ntawm nruab nrab phosphate thiab potassium chloride. Cov iav electrode thiab cov ntaub ntawv siv electrode tsim lub roj teeb los tsim kom muaj pH tus nqi ntawm xoom lub peev xwm, uas feem ntau yog nyob ntawm pH ntawm tus nqi siv tshuaj sab hauv thiab chloride ion concentration.
⑸ Electrode molded case: Cov ntaub ntawv electrode molded yog lub plhaub uas txhawb cov iav electrode thiab cov kua hlws ris, thiab tuav cov kev siv sab nraud, thiab yog molded los ntawm PPS yas siab.
⑹ Sab nrauv siv electrode: nyiaj / nyiaj chloride electrode, muaj nuj nqi yog muab thiab tuav lub peev xwm ruaj khov, uas yuav tsum tau muaj peev xwm ruaj khov, zoo rov tsim dua thiab me me kub coefficient.
⑺ Kev siv sab nraud: 3.3mol / L potassium chloride gel electrolyte, tsis yooj yim plam, tsis tas yuav ntxiv.
⑻Sand core kua hlws ris: Cov kua hlws ris yog qhov sib txuas uas txuas cov kev siv sab nraud thiab cov kev ntsuas ntsuas, thiab yuav tsum muaj kev nkag mus ruaj khov.
⑼ Electrode hlau: Nws yog cov hlau tsis tshua muaj suab nrov shielded hlau, lub hauv paus tseem ceeb yog txuas nrog cov khoom siv hluav taws xob sab hauv, thiab cov txheej thaiv thaiv tau txuas nrog rau sab nraud siv electrode.
4. Vim li cas cov pH electrode yuav tsum tau ntub dej? Yuav ua li cas kom ntub cov pH ua ke electrode?
Yog vim li cas tsom xam: pH electrode yuav tsum tau soaked ua ntej siv, vim hais tias lub pH noob yog ib tug tshwj xeeb iav daim nyias nyias, thiab muaj ib tug nyias hydrated gel txheej nyob rau saum npoo ntawm lub iav daim nyias nyias, uas tsuas yog cuam tshuam nrog H ions nyob rau hauv cov tshuaj. nyob rau hauv cov dej ntub dej. Muaj cov lus teb zoo. 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.
Soak lub pH composite electrode kom raug: Soak hauv pH4 tsis muaj tshuaj uas muaj KCL, kom nws tuaj yeem ua haujlwm ntawm lub iav qhov muag teev 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 tau siv ib qho pH iav electrode thiab tau siv los so rau hauv dej deionized lossis pH4 tsis haum. Tom qab ntawd, lawv tseem siv txoj kev ntub dej no thaum siv pH sib xyaw electrode, txawm tias qee qhov pH tsis raug electrodes. Qhov kev taw qhia yuam kev no kuj tau ua nyob rau hauv phau ntawv qhia ntawm electrode. Qhov cuam tshuam ncaj qha los 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 tsis zoo, thiab lub sij hawm ntub dej ntev dua, qhov ua tau zoo dua, vim tias tom qab lub sij hawm ntev soaking, cov kua. Kev sib tshuam Lub concentration ntawm KCL nyob rau hauv ciam teb (xws li hauv cov xuab zeb core) tau txo qis heev, ua rau lub peev xwm ntawm cov dej sib txuas nce thiab 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 buffer (250ml), yaj nws nyob rau hauv 250ml ntawm dej ntshiab, ntxiv 56 grams ntawm analytically ntshiab KCl, cua sov kom zoo, thiab do kom txog thaum yaj tag.
