Cov kauj ruam siv Burette Stopcock

Xyuas seb puas muaj cov dej ntws tawm, yuav tsum tau ntxuav, yaug, npuas hauv lub raj yuav tsum tau tso tseg, kev nyeem ntawv yuav tsum yog ob zaug, kab ntawm qhov pom, nplai, qhov qis tshaj ntawm qhov concave nto ntawm cov kua theem yog tib yam. kab rov tav, thaum soj ntsuam qhov kev sim hloov pauv, thaum tswj qhov ntau npaum li cas.

1, yooj yim burette tseem hu ua stopper burette, nws muaj lub raj roj hmab hauv qab, muaj iav marbles nyob rau hauv nruab nrab, siv los tswj cov dej ntws ntawm cov kua dej aqueous, nws yog siv los sau cov tshuaj alkaline thiab tsis txo cov tshuaj aqueous. , tag nrho cov kev daws teeb meem uas tuaj yeem ua tau zoo nrog cov roj hmab tsis tuaj yeem thauj mus rau hauv cov burette yooj yim, xws li KMnO4, K2Cr2O7, iodine tov, thiab lwm yam.

2. Lub burette flow rate tswj tsis yooj yim, cia siab rau hauv qab lub valve los tswj tus nqi ntws, qhib cov tee me me qeeb los yog txawm tias tsis drip, qhib cov tee loj dhau los sai heev los yog txawm poob rau qhov kawg. Kev nyeem ntawv yog qhov nyuaj, nws yog qhov yuav tsum tau nyeem cov kab ntawm qhov pom thiab cov kua dej ntawm tib theem, yog tias nws tsis yog kab rov tav, nws yuav tsim qhov yuam kev.

3. Cov roj hmab taub hau dropper yog qhov yooj yim heev rau kev siv, tab sis rau cov neeg tshiab los tiv tauj, nws tseem nyuaj dua. Roj hmab taub hau dropper muaj ib lub hau roj hmab thiab lub iav raj. Muaj ob peb daim ntawv xws li ncaj, ncaj nrog pob tsis thiab nkhaus nrog pob tsis. Cov lus qhia tshwj xeeb ntawm cov roj hmab tip dropper yog qhia nyob rau hauv lub raj ntev, thiab feem ntau siv nyob rau hauv 2 hom: 90 hli thiab 100 hli.