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Orientador(es)
Resumo(s)
This work exploits a multisyringe
injection analysis (MSFIA) system coupled with a long liquid waveguide
capillary cell for the spectrophotometric determination of zinc and copper in waters. A liquid
waveguide capillary cell (1.0mpathlength, 550mmi.d. and 250mL internal volume) was used to enhance
the sensitivity of the detection. The determination for both ions is based on a colorimetric reaction with
zincon at different pH values. The developed methodology compares favourably with other previously
described procedures, as it allows to reach low detection limits for both cations (LODs of 0.1 and 2mg L−1,
for copper and zinc, respectively), without the need for any preconcentration
step. The system also provided
a linear response up to 100mg L−1 with a high throughput (43 h−1) and low reagent consumption
and effluent production. The developed work was applied to natural waters and three certified reference
water samples.
Descrição
Palavras-chave
Copper Zinc Multisyringe Liquid waveguide capillary cell Spectrophotometry Natural waters
Contexto Educativo
Citação
PÁSCOA, Ricardo N.M.J; TÓTH, Ildikó V.; RANGEL, António O. S.S. - Spectrophotometric determination of zinc and copper in a multisyringe injection analysis system using a liquid waveguide capillary cell: Application to natural waters. In International Conference on Flow Injection Analysis and Related Techniques, 16th,(ICFIA 2010), Pattaya, Tailândia, 25-30 Abril, 2010. Talanta. ISSN 00399140. Vol. 84 (2011), p. 1267–1272