期刊
ANALYTICA CHIMICA ACTA
卷 471, 期 1, 页码 87-96出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0003-2670(02)00925-X
关键词
spectrofluorometry; multivariate calibration; net analyte preprocessing; partial least-squares; naproxen; salicylate; human serum
A direct method for the simultaneous determination of naproxen and salicylate in human serum is reported, based on a combination of spectrofluorometric measurements with two multivariate calibration techniques: partial least-squares (PLS-1) and the novel net analyte preprocessing (NAP). The method is rapid, selective and sensitive, and is based on the measurement of the fluorescence spectra of NH3 alkalinized whole human sera at the excitation wavelength of 315 nm. It can be applied within the ranges of concentrations 50-200 ng ml(-1) for naproxen and 100-300 ng ml(-1) for salicylate. The employed chemometric techniques have been compared on the basis of the statistical indicators for calibration and validation. Reproducibility and interference studies in abnormal sera have also been carried out. (C) 2002 Elsevier Science B.V. All rights reserved.
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