Resumo

CALIXTO, Carolina M. F.; CERVINI, Priscila  e  CAVALHEIRO, Éder T. G.. Determination of tetracycline in environmental water samples at a graphite-polyurethane composite electrode. J. Braz. Chem. Soc. [online]. 2012, vol.23, n.5, pp. 938-943. ISSN 0103-5053.  http://dx.doi.org/10.1590/S0103-50532012000500020.

A bare graphite-polyurethane composite was evaluated in the tetracycline (TC) determination in natural water samples. Using differential pulse voltammetry (DPV), a linear response was observed in the range of 4.00-40.0 µmol L^-1 with limit of detection of 2.80 µmol L^-1, without the need of surface renewing between successive runs. During the tetracycline determination in water samples, recoveries between 92.6 and 100% were found. The results for TC determination in water samples after a pre-concentration stage agreed with spiked value at a 95% confidence level according to student t-test.

Palavras-chave : tetracycline; graphite-polyurethane composite electrode; natural water.