Puas yog blister ntim raw khoom PVC muaj chlorine?

Tsis tas li ntawd, nws kuj tseem tuaj yeem txiav txim siab los ntawm kev ntsuas seb cov khoom puas muaj cov tshuaj chlorine, tab sis vim tias vinyl chloride copolymer, neoprene, polyvinylidene chloride, chlorinated polyvinyl chloride, thiab lwm yam., tag nrho cov muaj feem ntau ntawm cov tshuaj chlorine, nws yog ib qho tsim nyog los tsim cov xim los ntawm pyridine. teb los txheeb xyuas. Nco ntsoov tias ua ntej qhov kev xeem, cov qauv yuav tsum tau muab rho tawm nrog ether kom tshem tawm cov plasticizer. Kev sim txoj kev: Dissolve cov qauv coj nrog ether thiab benzene nyob rau hauv tetrahydrofuran, lim tawm cov insoluble Cheebtsam, ntxiv methanol rau precipitate nws, thiab tom qab extraction Qhuav hauv qab no 10 degree. Tsis txhob siv 1ml ntawm pyridine los teb nrog cov qauv me me qhuav. Tom qab ob peb feeb, ntxiv 2 tee ntawm 5 feem pua ​​sodium hydroxide methanol tov (1g sodium hydroxide yog yaj nyob rau hauv 20ml methanol), thiab tam sim ntawd saib cov xim, 5min thiab 1h thiab saib dua. Cov yas sib txawv uas muaj chlorine tuaj yeem txheeb xyuas los ntawm lawv cov xim.