Teeb meem cuam tshuam nrog acidity meter
1. Yuav ua li cas kho qhov kub thiab txias? Cov nyiaj kub puas tuaj yeem tshem tawm qhov ntsuas kub ntawm pH ntsuas qhov yuam kev?
Kev hais lus nruj me ntsis, kev them nyiaj kub yuav tsum suav nrog peb ntu: kev them nyiaj kub ntawm electrode nqes hav, kev daws qhov kub thiab txias, qhov kub thiab txias ntawm electrode xoom point (xws li ntsuas electrode thiab siv electrode). Qhov ntsuas kub ntawm qhov ntsuas pH tsuas yog qhov nqes hav ntawm cov nyiaj electrode (2.303RT / F). Yog li ntawd, qhov kub thiab txias tsis txaus rau pH meter ntsuas, thiab nws tsis tuaj yeem tshem tawm qhov yuam kev los ntawm qhov kub thiab txias. Tsuas yog vim hais tias qhov kub thiab txias ntawm qhov kev daws teeb meem thiab xoom-degree kub yam khoom ntawm electrode tsis tuaj yeem txiav txim siab, thiab qhov yuam kev tshwm sim los ntawm nws me me, yog li nws raug tshem tawm!
2. Yuav ua li cas los xyuas qhov zoo ntawm pH meter?
Feem ntau, qhov zoo ntawm cov electrode feem ntau yog txiav txim los ntawm txoj kab nqes ntawm cov electrode, thiab nws tseem tuaj yeem txiav txim los ntawm xoom mV tus nqi ntawm cov electrode.
Rau cov khoom siv hluav taws xob hauv kev lag luam, lub Hoobkas qauv yog qhov nqes hav ntawm 95 feem pua --105 feem pua. Zero peev xwm: ± 15mV, xoom muaj peev xwm yog qhov ntau, nyob rau hauv qhov no yog cov electrodes zoo heev, tsis yog 8.2mV muab los ntawm qee cov tuam txhab 'meter', txwv zero peev xwm ntawm electrodes mus txog 8.2mV. Tom qab ib lub sijhawm siv, lub peev xwm xoom yuav hloov pauv, thiab tsis pub dhau ± 60 mV. Txawm li cas los xij, txoj kab nqes yuav tsum tsis txhob qis dua 70 feem pua, thiab yog tias siab dua, nws yuav tsum tsis txhob qis dua 80 feem pua.
3. 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 ntxiv rau hauv kev daws teeb meem 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.
