Subject: Analyse of steel samples by FES, AAS...

Hi! I'm french student in chemistry at Napier Uni(UK) so please pardon me 
for my english! I have to analyse steel samples using different methods in 
order to compare them. I must find out the composition of the samples. I 
already know that i must analyse Fe, Cu, Zn, Cr, Mg ang maybe W and Va. My 
binomial and I have selected 2 methods of analysis: Atomic 
Emission/Absorption Spectroscopy and gravimetric techniques. The former 
methods doesn t present much problem, but the latter does. Do we have to 
separate these metalic cations before the analysis? How can we do and what 
do we need for that? 
Thanx very much indeed for an answer!
Yan

Re: Analyse of steel samples by FES, AAS...