Laboratory ntsuas pH meter thib peb point calibration
Thaum lub sij hawm soj ntsuam los ntawm chav tsev siv lub pH meter, cov lus nug nram qab no tau tsa: pH meter xav tau peb lub ntsiab lus ntawm calibration, thiab ob lub ntsiab lus tsis txaus. Rau qhov calibration ua tiav nrog 7.004.01, yog tias qhov thib peb xav tau, kuv puas yuav tsum siv qhov tsis sib xws ntawm 9.21 lossis lwm yam buffers xws li 10.01, 9.18, 12.46, 1.68? Yuav txiav txim li cas?
1. Qhov tseeb, kev kho pH ntawm qhov thib peb feem ntau yog nyob ntawm koj tus qauv coj mus kuaj. Raws li koj tau hais, muaj ntau ntau yam kev daws teeb meem xws li pH 1.68 txog 12.46, thiab cov kev daws teeb meem tsim nyog yuav tsum raug xaiv raws li qhov kawg pH ntau yam ntawm cov qauv. Peb feem ntau siv 4.00, 6.86, 9.18, yog tias koj tus qauv yog alkaline ntau, koj xav tau 9.18, 10.01, 12.46. Qhov kev txiav txim ntawm calibration sib txawv nrog cov cuab yeej sib txawv. Qee qhov xav tau calibration hauv kev txiav txim, thaum lwm tus tsis ua. Lub ntsuas yuav cia li paub nws. Thov xa mus rau phau ntawv qhia txog cov cuab yeej siv.
2. Txawm li cas los xij ntawm pH meter, qhov taw tes ntawm pH =7 yuav tsum tau ntsuas, thiab qhov taw tes ntawm pH =7 yuav tsum tau calibrated ua ntej thaum ua ob-point calibration. Thaum ua calibration, pib los ntawm 7.0, thiab cov txheej txheem xaiv kev daws teeb meem muaj feem xyuam rau cov pH tus nqi ntawm cov tshuaj yuav tsum tau ntsuas, kom pH tus nqi ntawm cov tshuaj yuav poob nyob rau hauv lub calibrated pH ntau yam. Feem ntau, ob lub ntsiab lus tuaj yeem siv los ua kom tau raws li qhov yuav tsum tau ua. Yog tias qhov kev xav tau siab heev, lub ntsiab lus thib peb yuav tsum xav txog. Qee cov twj paj nruag tuaj yeem ntsuas peb lub ntsiab lus, thiab muaj ib qho kev xaiv hom, uas tuaj yeem siv ncaj qha. Rau qee qhov uas tsis yog, ob-point ob-point proofreading feem ntau yog siv, uas yog, proofreading ob zaug.
3. Peb feem ntau siv calibration sequence ntawm 7, 4, 10. xyuas cov kua qaub ua ntej thiab tom qab ntawd lub hauv paus.
