The scenario depicted above is probative of the continuous interest
of the scientific community for developingmore and more methods capable
of determining antimony at very low concentrations.
Aminoacids and peptides were extensively employed by Holcombe
and his group [8] in metal binding studies. The use of carbon nanotubes
(CNTs) as SPE sorbents prior to atomic spectrometric determination of
metal species was reviewed by Herrero Latorre and coworkers [9]. Our
group has been studying the biosorption capabilities of aminoacids
immobilised on controlled pore glass for elemental SPE [10,11] for
many years.More recently, thework has progressed in the use of L-tyrosine
immobilised on multiwalled carbon nanotubes (MWCNTs) for the
selective determination of Tl [12] and Co [13], L-alanine for Ni [14], Pb
[14] and Cd [15] and L-proline for Bi [16].