head ons - Sourci
2.2 Cch tin hnh - S dng cc ct thu tinh c cha cc cht hp ph dng bt (pha tnh), thng l aluminium oxide, sillica gel,. - Cho hn hp cn tch ln ct sc k. - Cho dung mi thch hp chy.
2.2 Cch tin hnh - S dng cc ct thu tinh c cha cc cht hp ph dng bt (pha tnh), thng l aluminium oxide, sillica gel,. - Cho hn hp cn tch ln ct sc k. - Cho dung mi thch hp chy.
Nguyn tc ca phng php sc k ct l g? Sc k ct l phng php tch bit v tnh ch hn hp cc cht da vo s phn b khc nhau ca chng gia hai pha ng v pha tnh.
Sc k ct 101: Gii thch r rng v n gin v nhng iu c bn, mo v ng dng ca sc k ct phn tch thnh cng.
Understanding the Context
Lng hn hp sc k a ln bn mng c ngha rt quan trng i vi hiu qu tch sc k, nu qu nhiu th vt ko di, khng tch ring c, nu qu t th c th khng pht hin c.
Sc k ct l g? Tm hiu v k thut sc k ct v ng dng ca n trong phn tch ha hc. Cc yu t nh hng v cch thc hin hiu qu.
Nguyn tc ca phng php sc k ct l g? Sc k ct l phng php tch bit v tnh ch hn hp cc cht da vo s phn b khc nhau ca chng gia hai pha ng v pha tnh.
f6. Gii ly sc k ct: Tin hnh gii ly ct bt u vi hexane. Dng cc ng nghim hng cc phn on vi dung tch 5 mL. Theo di mu sc cc di trn ct. Khi di mu th nht xung ht, thay.
