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Eclética Química

Print version ISSN 0100-4670
On-line version ISSN 1678-4618


LOBO, F. A.; VILLAFRANCA, A. C.; OLIVEIRA, A. P. de  and  MORAES, M. de. TS-FF-AAS system with air-acetylene flame as alternative in relation to nitrous oxide-acetylene by FAAS for tin determination. Eclet. Quím. [online]. 2005, vol.30, n.2, pp.61-68. ISSN 0100-4670.

This work propose the development of analytical procedure for on line tin determination in analytical solutions by thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS) as alternative to nitrous oxide-acetylene flame by atomic absorption spectrometry, whose oxidant presents high costs with respect to air. Parameters were evaluated for the optimization of the system: flow of the carrier (air), volume of injected sample and concentration of the acid (HCl). The linear analytical curve [A= -0,00163 +0,00319 Sn], (r = 0,9998) ] was constructed on interval of 10 the 80 mg L-1 Sn. The detection limit, the relative standard deviations (n=12) and analytical frequency were: 1,7 mg L-1 Sn, £ 2,7% and 120 h-1, respectively. The TS-FF-AAS is an alternative for the determination of Sn.

Keywords : TS-FF-AAS; tin; metallic tube.

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