[kamiyu]

Hello guys
For those who did elemental analysis (EA) , I would like to ask you for experience.
1)   Is EA very difficult?
2)   What is the acceptable results??
3)   Most importantly, can you guys offer some advices for obtaining accurate results??
Thanks

[discodermolide]

EA is not difficult, there are machines that will do it for you.
I think the accepted norm is ±0.3% for publication.
Get the compound as pure as you can be crystallisation or chromatography. Make sure there is no residual solvent by putting it under high vacuum for some hours. Also, if you can do it and the compound has been exposed to metals get a metal analysis done as well (atomic absorption).