wah,so u already get ur result and finish ur experiment??

not yet...juz remain the last step: "evaporate the 80 test tubes" dont know wait until when?

huh,just evaporate them in room temperature and condition r???y dun u try to evaporate it by some heat or use nitrogen gas

ya, i used nitrogen gas to evap. the problem things r limited intrument n time consuming. each time 5 tubes oni n nid whole day to evap them

ur solvent used is not volatile 1 hor??so much time needed to evaporate it 1 meh??really

but dun give up o,+ u + u

is hexane lai (volatile)...but i kena used the long long test tube, so mah...tk TIME

yaya...i effort tiao

oh i see,but u can use a long tube for ur nitrogen gas to go into the long test tube also ler

and be carefull ya,coz hexane is carsinogenic eh

not match...the size can load the pipette tip nia

huh??? carsinogenic ya...hexane kena my hand many times liao lo...cham la

u must wear glove when handling it o,is quite toxic ler,n wear mask also,must protect urself a bit ya

aiyo...too late liao. i finished all baru tahu

aiyoyo,nvm ler,next time must be carefull a bit ha

kk...yes, madam