EDTA yog dab tsi thiab dab tsi yog nws siv
Mar 10, 2021
EDTA yog ib qho reagent dav siv nyob rau hauv complexometric titration hauv kev txheeb cais kev siv tshuaj. Nws yog ib tus neeg saib xyuas chelating muaj carboxyl thiab amino pawg, uas tuaj yeem tsim chelates nrog ntau cov tshuaj los pab txhawb kev soj ntsuam titration ntawm kev daws.
Hauv tshuaj lom neeg tshuaj xyuas, ntxiv rau cov lej xaj yooj yim, nws kuj tseem siv tau los ua tus neeg saib xyuas cov ntsej muag hauv ntau txoj kev sib cais thiab kev txiav txim siab. EDTA feem ntau yog siv los ua chelates nrog ions hlau, uas tuaj yeem muab faib ua cov kua qaub tsim thiab cov qauv ntawv yooj yim. Nws ua cov xim chelates tsis muaj xim nrog cov xim hlau ions, thiab feem ntau ua cov xim ntxig ntxig nrog cov xim tsis muaj hlau.
Daim ntawv thov:
1. EDTA yog ib tus neeg tseem ceeb uas zais qhov muag. EDTA yog dav siv los ua cov tshuaj dawb, kho xim zas, tshuaj kho fiber ntau, tshuaj pleev ib ce ntxiv, tshuaj tiv thaiv ntshav, tshuaj tua kab mob, tshuaj ua kom lub zog, polymerization initiator ntawm hluavtaws roj hmab, etc. EDTA yog tus sawv cev ntawm tus neeg saib xyuas chelating. Nws tuaj yeem tsim cov dej ruaj khov-daws teeb meem nrog alkali hlau, lub ntiaj teb tsis tshua muaj thiab hloov hlau.
Ntxiv nrog rau cov ntsev dej ntsev, kuj tseem muaj cov ntsev uas ammonium thiab ntau yam ntsev xws li hlau, magnesium, calcium, tooj, manganese, zinc, cobalt thiab txhuas, uas muaj kev siv sib txawv. Ntxiv rau, EDTA tseem tuaj yeem siv rau kev tshem tawm cov xov tooj cua uas tsim kev puas tsuaj los ntawm tib neeg lub cev thiab ua lub luag haujlwm tsis huv. Nws' s kuj muaj kev saib xyuas dej. EDTA kuj tseem yog qhov ntsuas tseem ceeb, tab sis nws siv los ua kom muaj feem rau nickel hlau npib tsib xee, tooj liab, thiab lwm yam thaum nws siv, nws yuav tsum siv nrog ammonia los ua qhov taw qhia.
2, EDTA yog tus neeg saib xyuas zoo calcium thiab magnesium chelating tus neeg sawv cev. Nws yog siv los ua tus neeg saib xyuas chelating rau emulsion polymerization. Nws kuj yog siv los ua cov neeg saib xyuas cov khoom ua kom tsis haum, uas yog, kev kho EDTA nrog dimethyl acrylate, tshem tawm cov kev hloov pauv hlau ions, tshem tawm ntawm kev cuam tshuam ntawm peroxide decomposition, thiab txhim kho kev ruaj khov ntawm anaerobic nplaum.
EDTA sodium ntsev chelating hlau ions tuaj yeem txhim kho qhov nrawm ntawm hloov kho cov kua qaub. Cia ruaj khov ntawm cov qauv txheej txheem nplaum (SGA), ntau npaum - 3 × 10-4 ～ 6.0 × 10-4。 5%, thiab kev cia ruaj khov ntawm 50 ~ C yog ntau dua 360h (cia ntawm 50 ℃ rau 4D, sib npaug rau sga20 ~ C cia rau 1 xyoo).
