Yuav siv lub ntsuas pH li cas thiab kev ceev faj yuav tsum tau ua
Kev npaj ua ntej siv ph meter
1, kev siv PH meter ua ntej thawj peb chav dej los ntxuav cov electrode, xyuam xim rau cov iav electrode tsis txhob kov qhov tawg.
2, Kev npaj nyob rau hauv lub platform ntawm ib sab ntawm PH 'meter' muab rau kev hloov kho ntawm NAOH kua thiab HCL kua.
3, nyob rau hauv lub tub yees tawm ntawm cov kua PH ruaj (PH=70), muab tso nrog lub platform.
4, qhib PH meter, kho tus nqi PH, nias ︿ qhov tseem ceeb los xaiv PH thiab CAL xaiv, xaiv cov khoom CAL, kho qhov ntxig rau hauv PH kua (PH=7.0), nias lub " " yuam sij rau xaiv cov ntaub ntawv tus nqi rau 7.0, cov tsos ntawm ib tug me me octagonal yuav ua tau.
5, Ntxig lub iav electrode rau hauv cov tshuaj uas yuav tsum tau ntsuas, thiab tom qab ntawd muab tso rau hauv lwm lub electrode, do cov kua kom tsim nyog (Ceeb toom: Tsis txhob kov lub iav electrode tawg).
6, PH meter hluav taws xob siv hluav taws xob yuav tsum tau them sai sai rau kev tiv thaiv hluav taws xob, hauv PH tus nqi tsis raug ntsuas, kom luv luv-circuit input ntawm PH meter, thiaj li tsis txhob muaj kev puas tsuaj rau PH meter.
7, PH meter iav electrode qhov (socket) yuav tsum tau khaws cia kom huv si, huv si thiab qhuav, tsis tuaj yeem raug cov tshuaj ntsev thiab kua qaub thiab lwm cov pa phem, thaum nws yog nruj me ntsis txwv tsis pub iav electrode qhov (socket) stained nrog cov dej daws kom tsis txhob muaj PH meter siab nkag. impedance.
8, tsis yog rau tus nqi PH koj yuav tsum tau ceev faj ntxiv xws li NAOH kua thiab HCL kua, (raws li qhov sib txawv hloov ntau yam tuaj yeem xaiv qhov sib txawv ntawm qhov kev hloov pauv ntawm cov kua, qhov concentration ntawm cov sij hawm me me tuaj yeem ntxiv sai. , thaum lub concentration loj ntxiv qeeb).
9, thaum ntxiv cov kua, yuav tsum ceev faj kom tsis txhob tshaj qhov yuav tsum tau ntim ntim.
Cov lus qhia txog kev siv ph meter
1, feem ntau, ph meter ntsuas hauv kev siv tas li, yuav tsum tau ntsuas ib hnub ib zaug; feem ntau hauv 24 teev ntawm qhov ntsuas tsis tas yuav tsum tau ntsuas.
2, ua ntej siv lub ph meter electrode los rub lub sab sauv kawg ntawm lub tes tsho roj hmab kom nws nthuav tawm qhov kawg ntawm lub qhov me me.
3, calibration ntawm cov tshuaj buffer feem ntau yog siv rau thawj zaug nrog pH=6 86 tov, lub thib ob lub sij hawm nrog ib tug buffer ze rau pH tus nqi ntawm cov ntsuas, xws li ntsuas. kev daws yog acidic, qhov tsis yuav tsum tau xaiv pH=4.00; xws li cov tshuaj ntsuas yog alkaline thaum tsis xaiv pH=9.18.
4, kev ntsuas, kev taw qhia ntawm cov hlau electrode yuav tsum nyob ruaj ruaj, txwv tsis pub nws yuav ua rau kev ntsuas tsis ruaj khov.
5, lub electrode yuav tsum tsis txhob muab tso rau hauv dej distilled, PH meter electrode siv rau cov electrodes tshiab los yog ntev tsis siv electrodes, lub electrode yuav tsum tau soaked nyob rau hauv dej distilled ob peb teev ua ntej siv, thiaj li hais tias PH meter electrode asymmetric tej zaum yuav qis dua. mus rau theem ruaj khov, yog li txo cov electrode sab hauv tsis kam.
6, PH meter nyob rau hauv PH tus nqi ntsuas, kom ntseeg tau tias cov electrode npuas tag nrho rau hauv qhov ntsuas nruab nrab, thiaj li kom tau txais kev ntsuas qhov tseeb dua.
7, PH meter siv, tshem tawm cov roj hmab ntsaws ntawm qhov siv electrode pitting kua ntxiv chaw nres nkoj
