Kev siv cov burettes kom raug

Titration tsom xam, tseem hu ua kev ntsuas ntim, yog qhov sib ntxiv ntawm cov txheej txheem kev daws teeb meem ntawm kev paub tseeb concentration rau kev daws cov tshuaj ntsuas kom txog thaum cov tshuaj ntsuas tau ua tiav nrog cov txheej txheem ntxiv, thiab tom qab ntawd cov ntsiab lus ntawm cov khoom raug xam. raws li qhov ntim thiab concentration ntawm cov txheej txheem kev daws teeb meem. Kev ntsuas qhov tseeb ntawm cov kua ntim yog ib qho tseem ceeb hauv kev soj ntsuam titration thiab yog ib qho tseem ceeb hauv kev tau txais cov txiaj ntsig zoo analytical, uas nws yog ib qho tseem ceeb kom nkag siab txog kev siv cov ntsuas ntsuas ntsuas ntsuas kom raug.

Burette yog lub iav ntsuas uas tuaj yeem ntsuas qhov ntim ntawm titrant noj thaum lub sij hawm titration, nws yog ib lub iav iav raj nrog ib tug precision scale thiab uniform puab txoj kab uas hla, uas muaj peev xwm tsis tu ncua tso tawm txawv volume ntawm kua raws li xav tau thiab kom meej nyeem tawm lub ntim ntawm. ua kua.

Nyob ntawm qhov ntev thiab ntim, burettes tuaj yeem muab faib ua macroburettes, semi-microburettes thiab microburettes.

Qhov ntim ntawm macroburette yog 50 mL, 25 mL, qhov tsawg kawg nkaus teev yog 0.1 mL, thiab qhov tsawg kawg nkaus nyeem tau yog 0.{{10} }1 mL. Lub ntim semi-microburette yog 10 mL, qhov ntsuas tsawg kawg yog 0.05 mL, thiab qhov tsawg kawg nkaus nyeem tau yog 0.01 mL. Nws cov qauv feem ntau zoo ib yam li cov burette tas li. Microburette ntim muaj nyob rau hauv 1mL, 2mL, 5mL, thiab 10mL, nrog qhov tsawg kawg nkaus ntawm 0.01mL thiab qhov tsawg kawg nkaus nyeem tau ntawm 0.001mL. Kuj tseem muaj ib qho semi-micro semi-automatic burette, uas tuaj yeem tso cov kua ua kua, tab sis cov titration tseem yuav tsum tau tswj manually.

Burettes feem ntau muab faib ua ob hom, acid burettes thiab yooj yim burettes.

Acid burette, tseem hu ua stopper burette, muaj lub iav stopcock hloov nyob rau hauv qis kawg, uas yog siv los tuav acidic tov thiab oxidizing tov thiab ntsev tov, thiab tsis muaj alkaline tov xws li NaOH. Basic burette, tseem hu ua stopperless burette, muaj ib tug roj hmab raj nyob rau hauv lub qis kawg, thiab ib tug iav hlaws nyob rau hauv nruab nrab los tswj cov ndlwg tus nqi ntawm cov tshuaj, nws yog siv los tuav alkaline tov thiab non-oxidizing tov, thiab cov tshuaj. uas tuaj yeem ua haujlwm nrog lub raj roj hmab tsis tuaj yeem thauj khoom mus rau hauv cov burette yooj yim, xws li KMnO4, K2Cr2O7, iodine tov, thiab lwm yam. Vim yog siv cov PTFE pistons uas tsis ntshai ntawm alkali, qhov tsis zoo ntawm cov kua qaub burettes tau kov yeej thiab Cov kua qaub burette tuaj yeem ua rau universal rau cov kua qaub thiab alkali, yog li kev siv cov burettes yooj yim txo qis heev.