Qhia txog kev tiv thaiv kom ceevfaj rau photibration
Cov sim xav tau ntau lub sijhawm ntawm kev ntsuas hluav taws xob vim kev sim yuav tsum tau ua cov kev ntsuas ntau zaus thiab cov kev daws teeb meem txawv. The current calibration methods are generally divided into one or two-point calibration, three-point calibration. Lub sijhawm ntsuas hluav taws xob ntau dua, qhov ntau dua qhov tseeb, thiab qhov ntau dua cov ntsuas hluav taws xob acidity.
Thaum ntsuas qhov ntsuas ua ntej ntsuas, cov kev daws teeb meem ntawm cov qauv uas ze rau tus nqi xeem phot yuav tsum raug xaiv. Tom qab ntsuas qhov ntsuas nrog kev daws teeb meem ntawm kev ntsuas, lwm qhov kev ntsuas ntawm 3 yuav tsum tau siv rau kev txheeb xyuas, thiab qhov yuam kev yuav tsum tsis pub tshaj ± 0.1. Ua ntej txhua yam hloov ntawm tus qauv tsis muaj kev daws teeb meem lossis cov tshuaj ntsuas, ntsuas hluav taws xob yuav tsum tau ntxuav nrog dej, thiab tom qab ntawd dej yuav tsum tau nqus. Lwm txoj kev, hloov pauv tus qauv tsis hloov lossis cov tshuaj sim tuaj yeem siv rau kev ntxuav.
Txhawm rau calibrate lub p kuaj thib pHE, ob qho kev daws teeb meem yog txaus. Yog tias cov qauv kuaj tau yog acidic, thov calibrate cov kev sojntsuam raws li cov qauv ntawm pH 7 thiab 10. Yog tias cov kev daws teeb meem yog muaj nyob hauv pH 7 thiab 10. Cov granules muaj qhov zoo ntawm lub sijhawm ntev thiab kev lag luam, tab sis lawv tsis yooj yim. Cov kev daws tiav lawm yog yooj yim siv, tab sis nws yog ib txwm rau kom lwj tom qab qhib lub hau. Koj tuaj yeem faib cov kev daws tiav ua tiav rau kev siv beakers rau kev siv.
Yog tias koj siv granules hmoov, thov npaj cov kev daws teeb meem tsis muaj 50ml ntawm cov dej deionized ua ntej ntsuas hluav taws xob ua ntej ntsuas hluav taws xob ua ntej ntsuas hluav taws xob ua ntej ntsuas hluav taws xob ua ntej ntsuas hluav taws xob ua ntej ntsuas hluav taws xob ua ntej ntsuas hluav taws xob ua ntej ntsuas hluav taws xob ua ntej calibration. Cov kev daws teeb meem yuav tsum tau nchuav tawm tom qab calibration. Yog li ntawd, cov kev daws teeb meem tiav yuav tsum tau faib thiab siv cais. Tsis txhob nchuav cov khoom siv siv rov qab rau hauv lub raj mis hais.
Thaum ntsuas qhov ntsuas siab ntev ntev kuaj, saib xyuas yuav tsum tau them rau qhov teeb meem ntawm Alkali yuam kev, thiab yog tias tsim nyog, haum iav cov khoom yuav tsum tau xaiv rau kev ntsuas.
Tus lej pH tus nqi ntawm cov kev daws tsis muaj zog yog ntsuas siv cov ntsuas pa qaub. Ua ntej, ntsuas ntsuas yog ntsuas nrog cov poov tshuaj hydrogen phthalate qauv txiav tawm, thiab tom qab ntawd kev ntsuas daws yog ntsuas. Tom qab ntawd, qhov kev xeem daws tau raug coj los ua dua thiab tus nqi PIC raug ntsuas kom txog thaum kev nyeem ntawv tsis hloov los ntawm ntau dua ± 0.05 tsis pub dhau 1 feeb; Tom qab ntawd calibrate qhov ntsuas nrog borax txheem buffer daws, thiab ntsuas nws raws li tau piav saum toj no; Qhov sib txawv ntawm cov thib ob nyeem ntawv yuav tsum tsis pub tshaj 0.1, thiab nruab nrab ntawm kev nyeem ntawv theem ob yuav tsum tau coj raws li tus nqi PH. Cov dej siv los npaj cov qauv tsis sib xws thiab yaj cov kev ntsuas ntsuas yuav tsum yog freshly boiled txias distilled dej nrog tus nqi PH.5-7.0. Cov kev daws teeb meem yog feem ntau yog khaws cia rau 2-3 lub hlis, tab sis yog hais tias muaj kev nruj kev nruj, pwm, lossis kev ua kom nruj, nws tsis tuaj yeem siv txuas ntxiv.
