Vim li cas sublimation siv los ntxuav caffeine?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Cov khoom uas tau sau tom qab extraction tseem muaj ntau impurities. Sublimation yog ib txoj kev mus ua kom huv piv, vim caffeine muaj peev xwm kis tau ncaj qha los ntawm cov khoom mus rau vapor thiab thim rov qab los ua ib qho khoom tag nrho yam tsis tau mus rau theem ua kua.

Ntawm no, sublimation purify lub recrystallized caffeine li cas?

Caffeine tuaj yeem ntxuav tau los ntawm sublimation Nyob rau hauv lub tshuab nqus tsev vim nws muaj qhov tsim nyog vapor siab ntawm qhov kub hauv qab nws cov melting ntau ntawm 234-237 ° C. Nqa lub nplhaib nrog lub tshuab nqus tsev mus rau qhov chaw uas koj tuaj yeem rub lub tshuab nqus tsev rau ntawm nws thiab nkag mus rau lub tshuab hluav taws xob.

Tsis tas li ntawd, puas caffeine sublime? Caffeine sublimes nyob ib ncig ntawm 160 ° C thiab, thaum lub caffeine vapor txias, nws rov tsim cov khoom ntshiab. Yog li ntawd nws yog ib qho yooj yim heev los cais nws ntawm impurities (uas tsis yog sublime ). Lwm qhov sib xyaw uas sublimes yog carbon dioxide.

Tom qab ntawd, ib tug kuj yuav nug, yog vim li cas koj thiaj li sublime caffeine?

Cov kua caffeine Tom qab ntawd tuaj yeem raug xa tawm thiab lub tshuab nqus tsev lim. Cov impurities tsis tuaj yeem sublime nrog caffeine vim lawv xav tau qhov sib txawv ntawm qhov kub thiab txias. Hauv essence, lub caffeine yog sublimated los ntawm cov khoom nyoos, cia cov neeg sim sau caffeine thiab tawm hauv qab impurities.

Vim li cas cov tshuaj methylene chloride siv los rho caffeine?

Ntawm no yog cov organic hnyav Cov tshuaj dichloromethane yog siv rau extract caffeine los ntawm aqueous rho tawm ntawm tshuaj yej nplooj vim caffeine yog ntau soluble nyob rau hauv Cov tshuaj dichloromethane (140 mg / ml) dua li hauv dej (22 mg / ml). Caffeine tuaj yeem ua rau lub paj hlwb thiab tuaj yeem ua rau kom cov leeg ua pa thiab mob plawv.