TY - CONF AU - De La Guardia, M. AU - Khalaf, K.D. AU - Kasan, B.A. AU - Morales-Rubio, A. AU - Arias, J.J. AU - Garcia-Fraga, J.M. AU - Jimenez, A.I. AU - Jimenez, F. T1 - Simultaneous kinetic spectrophotometric determination of five phenolic compounds by reaction with p-aminophenol, using partial least squares data treatment LA - eng PY - 1996 SP - 1321 EP - 1326 T2 - Analyst SN - 0003-2654 VL - 121 IS - 9 PB - Royal Society of Chemistry AB - A fast and accurate procedure has been developed for the simultaneous determination of resorcinol, m-aminophenol, o-cresol, phenol and m-cresol in waters. The method is based on the reaction between the aforementioned phenolic compounds, at concentration levels of ppm, and 300 ppm of p-aminophenol in 0.05 mol l-1 NaOH and in the presence of 0.004 mol l-1 KIO4. The treatment of absorbance data, between 400 and 700 nm, obtained at interval times of 20 s between 40 and 120 s and 40 s between 120 and 600 s, by means of the use of Partial Least Squares 2 (PLS-2), using the UNSCRAMBLER program, suggested that the use of 7 factors can explain more than 99.5% of the residual variance. The method has been applied to the analysis of synthetic samples, not employed for calibration, and average errors lower than 4% were found. DO - 10.1039/AN9962101321 UR - https://portalciencia.ull.es/documentos/5e3adb74299952629a023b8b DP - Dialnet - Portal de la Investigación ER -