Yuav Ua Li Cas Saib Xyuas seb pH Meter puas raug
Yuav ua li cas xyuas seb pH meter puas yog?
Txoj kev txhim khu kev qha thiab yooj yim tshaj plaws yog siv cov txheej txheem pH tsis haum rau calibration. Siv peb lub pH qauv tsis daws teeb meem: pH 6.86, pH 4.00, thiab pH 9.18 (nyiam dua tshiab tau npaj thiab nyob rau tib qhov ntsuas kub), ua qhov ntsuas qhov ntsuas pH 6.86, txoj kab nqes nqes ntsuas pH 4.00, thiab tom qab ntawd kuaj pH 9.18 meter yog qhov tseeb thiab pH. Yog tias qhov tseeb tsis yog raws li tus qauv, nws tuaj yeem txiav txim siab ntxiv seb puas muaj teeb meem nrog pH meter lossis pH electrode.
Thaum pH electrode muaj paug thiab ua rau kev ua haujlwm tsis zoo lossis siv tsis tau, thov ntxuav nws raws li cov txheej txheem hauv qab no ua ntej calibration, uas yuav rov qab pH electrode. Txwv tsis pub, thov yuav pH electrode tshiab:
Soak hauv 0.1mol / L HCl los yog HNO rau ib nrab ib teev, ces tsau rau hauv cov tshuaj cia rau lwm teev.
2. Kev ntxuav ntawm electrode deposits:
2-1. Protein: So hauv 1% gastric protease hydrochloric acid tov (HCl concentration ntawm 0.1mol / L) rau 15 feeb, los yog tsau hauv 10% sodium hypochlorite tov rau 5 feeb.
2-2. Inorganic tshuaj: Soak hauv 0.1mol / L EDTA tov rau 15 feeb.
2-3. Cov roj thiab roj: ntxuav nrog tshuaj ntxuav me me lossis tshuaj methanol.
3. Tom qab ntxuav, cia nws qhuav thiab xyuas cov kua filling (yog tias nws tsawg dhau, thov sau nws). Tom qab ntawd, muab cov pH electrode tso rau hauv cov tshuaj cia rau tsawg kawg 1 teev.
Yog tias tsis muaj cov tshuaj khaws cia, ntxiv 1g KCl rau 200mL (pH =7 buffer solution) tov thiab co zoo ua ntej siv ib ntus.
