Yuav ua li cas cov electrode tiv thaiv tov rau pH meters?
Npaj 3mol / L KCL tov ntawm ph meter. Lub ph electrode ntawm ph meter yog kev tiv thaiv los ntawm kev tiv thaiv cov tshuaj tiv thaiv hauv lub sheath ua ntej siv, txhawm rau ua kom nws qhov qub ph muaj peev xwm sib npaug tsis hloov, thiab ua kom qhov ntsuas qhov tseeb dua. Qhov no yog cov tshuaj tiv thaiv ntawm pH electrode, uas yog, 3mol / L KCL tov. Yog li koj yuav tsum kawm yuav ua li cas kho nws ntawm koj tus kheej, kom cov pH electrode yog tsau rau hauv cov tshuaj tiv thaiv, kom nws cov dej num tuaj yeem rov qab tau sai, thiab nws tuaj yeem ntsuas tau zoo dua. Cov hauv qab no yog cov kauj ruam los npaj cov tshuaj ph meter tiv thaiv - 3mol/L KCL tov:
1. Kev suav: KCL molar mass yog 74.5g/moL, ces KCL hnyav=3mol × 74.5g/mol=223.5g;
2. Nyhav: Nyhav KCL=223.5g nrog kev ntsuas ntsuas, ua tib zoo saib xyuas kev siv qhov ntsuas qhov ntsuas;
3. Dissolving: siv 100ml ntawm distilled dej nyob rau hauv ib tug beaker kom yaj tag, thiab do nrog ib tug iav pas nrig;
4. Hloov thiab ntxuav: hloov cov tshuaj yaj mus rau hauv 1000ml ntim ntim, thiab siv lub raj ntim ntim nrog lub qhov ncauj nqaim.
5. Nco ntsoov: Txhawm rau tiv thaiv cov tshuaj los ntawm kev nchuav, thiab tib lub sijhawm tsis txhob cia cov tshuaj ntws mus rau hauv lub raj mis phab ntsa saum cov nplai kab, siv lub iav pas nrig rau cov kua dej. Txhawm rau kom ntseeg tau tias cov kua dej raug xa mus rau lub khob ntim ntim kom tiav raws li qhov ua tau, lub beaker thiab iav pas nrig yuav tsum tau ntxuav nrog dej distilled ob lossis peb zaug, thiab cov tshuaj tom qab txhua qhov ntxuav yuav tsum tau nchuav rau hauv lub khob ntim dej. Maj mam co lub khob ntim ntim kom sib tov kom huv si. (drainage nrog iav pas nrig)
6. Qhov ntim tsis tu ncua: Thaum ntxiv dej rau 2-3 cm ze rau qhov ntsuas, siv cov roj hmab dropper ntxiv cov dej distilled rau qhov ntsuas. Thaum qhov ntim tas li, xyuam xim tias qhov qis tshaj ntawm cov kua dej ntawm cov kua nplaum yog tangent mus rau qhov ntsuas kab, thiab txoj kab ntawm qhov muag ntawm qhov muag yog kab rov tav mus rau qhov ntsuas kab. Tsis txhob ntsia lossis ntsia, txwv tsis pub nws yuav ua rau yuam kev.
7. Co kom zoo: qhov concentration ntawm cov tshuaj tom qab lub ntim tas li tsis sib xws, lub cork ntawm lub ntim ntim yuav tsum tau nruj nreem ntsaws, thiab lub cork yuav tsum tuav nrog tus ntiv tes taw, thiab hauv qab ntawm lub raj mis yuav tsum tau txais kev txhawb nqa. tus ntiv tes ntawm qhov tod tes, thiab lub khob ntim ntim yuav tsum tig rov qab thiab shaken ob peb zaug, sib tov cov tshuaj sib npaug.
8. Co cov tshuaj KCL tom qab ntim tas li. Ncuav cov tshuaj npaj rau hauv lub raj mis reagent, cap lub raj mis, thiab sau nws. Qhov no yog 3mol / L KCL tov. Lub calibration buffer ntawm pH meter kuj muaj nws txoj kev teeb tsa, tab sis lawv feem ntau yog bagged reagents, uas yooj yim rau configure, thiab cov no kuj muaj nyob rau hauv lub khw.
