Design of a flow system with solid phase extraction (SPE) coupled to thermospray quartz tube furnace atomic absorption spectrometry (TS-QT-FFAAS) for determination of traces of gold.

E MORZÁN; O PIANO; J.STRIPEIKIS; M. TUDINO

Foz do Iguazu

Simposio; 12th Rio Symposium on Atomic Spectrometry; 2012

CENA-Universidad de San Pablo

Gold concentrations in natural matrices are extremely low. Its quantification involves a pre-concentration stage (fire assay and MIBK extraction) followed by an atomic absorption spectrometric analysis. Usually, the pre-treatment process is long and tedious, it requires a big amount of sample and it implies a high risk of cross contamination. It also employs a good number of auxiliary reagents that can produce interferences in the analytical determination. In this work, we studied a flow system with solid phase extraction (SPE) coupled to TS-QTFAAS. A good analytical response was obtained through the optimization of both, the manifold design and the operational variables, mainly those dealing with the type and concentration of reagents for pre-concentration and release of the analyte.