Kev daws teeb meem ntau nrog pH ntsuas!
1. Puas yog ob qhov kev ntsuas ntawm tib tus qauv muaj qhov sib txawv pH?
Kev hloov pauv kub lossis tshuaj lom neeg tshwm sim hauv cov qauv nws tus kheej tuaj yeem ua rau muaj kev hloov pauv ntawm pH tus nqi. Yog li ntawd, nws yog ib qho tseem ceeb kom tswj tau qhov kub thiab txias thiab tsis txhob muaj tshuaj lom neeg.
2. Puas yog qhov kev nyeem ntawv tsis sib haum thaum ntsuas tib tus qauv ntawm ob lub pH meters ib txhij?
Vim muaj qhov sib txawv calibration ntawm ob lub pH meters (xws li calibration tau ua nyob rau lub sijhawm sib txawv), muaj qhov sib txawv ntawm qhov ntsuas qhov ntsuas. Yog li nws yog ib qho tsim nyog los ntsuas pH meter siv tib lub sijhawm tsis sib xws, thiab tom qab ntawd ntsuas nws ib txhij.
3. Vim li cas nws thiaj li tsis zoo nyob rau hauv nws lub sij hawm siv tau thiab siv tsis tau?
Lub txee lub neej ntawm cov tshuaj tsis yog hais txog lub txee lub neej thaum nws tsis qhib rau kev siv. Thaum qhib rau kev siv, qhov tsis tuaj yeem ua rau tsis zoo vim muaj kev cuam tshuam ntawm ntau yam pwm hauv huab cua.
Ceeb Toom: Tsis txhob nchuav cov khoom siv rov qab rau hauv lub raj mis qub!
4. Ntev npaum li cas cov electrode yuav tsum tau calibrated?
Qhov zaus ntawm electrode calibration yog nyob ntawm cov kev mob tshwj xeeb ntawm kev siv electrode, kev saib xyuas, qauv khoom, thiab ntsuas qhov tseeb. Nws raug nquahu kom calibrate ib hnub ib zaug, nrog qhov siab tshaj plaws ntawm ib zaug ib lub lim tiam. Hloov cov electrodes thiab tsis siv lawv ntev yuav tsum tau calibration ua ntej siv.
5. Yuav ua li cas tswj pH electrode?
Tom qab siv cov electrode rau ib lub sij hawm, yog tias txoj kab nqes qis los yog cov lus teb qeeb qeeb, cov hauv qab no tuaj yeem sim:
① Yog tias cov qauv ntsuas muaj cov protein, cov khoom siv electrode tuaj yeem ntxuav nrog Pepsin / hydrochloric acid lotion.
② Yog tias cov qauv ntsuas yog cov kua roj / organic, nws tuaj yeem yaug nrog acetone lossis ethanol.
③ Yog tias pom tias cov tshuaj electrode tau ua qias neeg thiab dub, thiol ntxuav cov tshuaj yuav siv tau los ntxuav cov tshuaj tov tshuaj.
④ Ua kom lub electrode membrane. Txoj kev ua kom: Soak cov tshuaj electrode regeneration rau 30 vib nas this, thiab tom qab ntawd tsau nws hauv 3mol / L KCl tov rau 5 teev.
6. Cov qauv ntsuas kub yog 10 degree, thiab pH tus nqi tso tawm ntawm qhov ntsuas ntawm 10 degree lossis 25 degree?
Lub pH meter qhia pH tus nqi ntawm cov tshuaj ntawm qhov ntsuas kub tam sim no. Yog tias ntsuas ntawm 10 degree, lub ntsuas ntsuas qhia tus nqi ntawm cov tshuaj ntawm 10 degree. Yog tias pH ntawm 25 degree yuav tsum tau, qhov kev daws teeb meem yuav tsum tau nce / txo qis rau 25 degree ua ntej ntsuas. Kev them nyiaj kub ntawm pH ntsuas yog hais txog kev them nyiaj rau qhov kub ntawm pH electrode, tab sis nws tsis tuaj yeem them tus nqi pH ntawm txhua qhov kub txog 25 degree.
7. Vim li cas cov electrode tso saib 7.02 tom qab calibration hauv pH 7.00 tsis muaj tshuaj?
Nyob rau lub sijhawm no, qhov ntsuas kub tsis nyob ib puag ncig 20 degree. Vim qhov hloov pauv me ntsis ntawm pH tus nqi ntawm cov tshuaj tsis haum nrog qhov kub thiab txias, 7.00 tsuas yog tus nqi ntawm cov tshuaj tsis haum ntawm 25 degree, thaum tus nqi ntawm cov tshuaj tsis haum ntawm 20 degree yuav tsum yog 7.02. Lub pH meter tuaj yeem them rov qab rau qhov cuam tshuam ntawm qhov kub thiab txias ntawm qhov kev daws teeb meem los xyuas kom meej qhov ntsuas qhov tseeb.
