Yuav Qhia Li Cas Yog tias koj lub ntsuas pH raug raug
Muaj ntau tus neeg siv uas muaj kev tsis ntseeg thaum siv lub ntsuas pH. Qhov no pH meter puas yog? Qee tus neeg txiav txim los ntawm kev ua haujlwm, qee tus txiav txim los ntawm pH daim ntawv xeem, thiab qee tus txiav txim los ntawm pH meter siv yav dhau los. tsis ntseeg. Qhov tseeb, txoj kev nyab xeeb tshaj plaws, txhim khu kev qha thiab yooj yim tshaj plaws yog siv pH txheej txheem tsis siv tshuaj rau kev kuaj xyuas. Qhov no yog tus qauv pov thawj. Siv peb qhov kev daws teeb meem tsis zoo: pH6.86, pH4.00, pH9.18, nyiam dua tshiab tshiab thiab nyob rau tib qhov kub, siv pH6.86 rau qhov chaw calibration, pH4. {9}} rau kev ntsuas kev nqes hav, thiab tom qab ntawd sim pH9.18, pH seb qhov kev suav yog qhov tseeb thiab seb nws puas tsim nyog tuaj yeem paub tam sim ntawd. Yog tias qhov tseeb tsis tsim nyog, koj tuaj yeem txiav txim siab ntxiv seb puas muaj teeb meem nrog pH meter lossis pH electrode. Txij li thaum nrhiav pH meter yuav tsum tau siv cov cuab yeej siv thiab cov txheej txheem, peb tuaj yeem siv txoj hauv kev hauv Tshooj 23 ntawm phau ntawv no txhawm rau txheeb xyuas qhov zoo ntawm pH electrode, uas yog, peb tuaj yeem txiav txim siab seb nws yog pH electrode tshiab lossis xa pH. meter kho.
Vim li cas thiaj yuav tsum tau pH electrode ua ntej siv?
Lub 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 txheej ntawm hydrated gel nyob rau saum npoo ntawm lub iav membrane. H plus nyob rau hauv kev daws muaj cov lus teb zoo ruaj khov. Yog tias qhov immersion tsis txaus, tus nqi teb yuav tsis ruaj khov thiab drift thaum ntsuas. Lub sijhawm soaking feem ntau yog ntau tshaj 24 teev.
Rau pH ib lub iav electrode, nws tuaj yeem tsau rau hauv dej distilled lossis 3. Rau cov PH sib xyaw electrode, koj tuaj yeem siv dej desalted los yog dej distilled los yog 3.0N tov, yog tias tsau rau ntev, koj yuav tsum siv 3.0N KCL tov. Thaum siv PH ib lub iav electrodes ua ntej, txhua tus tau siv los so hauv dej ionized. Yog hais tias siv PH composite electrodes, lawv tseem nyob rau hauv dej deionized rau lub sij hawm ntev, ces txoj kev soaking tsis ncaj ncees lawm yuav ua rau: ib tug pH electrode nrog kev ua tau zoo yuav ua rau ib tug electrode nrog qeeb teb thiab tsis zoo precision, thiab ntev lub sij hawm immersion, qhov ua tau zoo dua, vim tias tom qab kev tso dej ntev ntev, KCL concentration ntawm cov khoom siv hluav taws xob yuav raug txo kom tsawg, thiab cov kua dej sib txuas yuav nce thiab tsis ruaj khov.
