Highly sensitive quantitation of pesticides in fruit juice samples by modeling four-way data gathered with highperformance liquid chromatography with fluorescence excitation-emission detection

MILAGROS MONTEMURRO; LICARION PINTO ; GERMANO VERAS; ADRIANO DE ARAÚJO GOMES; MARÍA JULIA CULZONI; MARIO CESAR UGULINO DE ARAUJO; HECTOR GOICOECHEA

TALANTA

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2016 vol. 154 p. 208 - 218

0039-9140

A study regarding the acquisition and analytical utilization of four-way dataacquired by monitoring excitation?emission fluorescence matrices at differentelution time points in a fast HPLC procedure is presented. The data weremodeled with three well-known algorithms: PARAFAC, U-PLS/RTL and MCRALS,the latter conveniently adapted to model third-order data. The secondorderadvantage was exploited when analyzing samples containing uncalibratedcomponents. The best results were furnished with the algorithm U-PLS/RTL.This fact is indicative of both no peak time shifts occurrence among samples andhigh colinearity among spectra. Besides, this latent-variable structured algorithmis capable of better handle the need of achieving high sensitivity for the analysisof one of the analytes. In addition, a significant enhancement in both predictionsand analytical figures of merit was observed for carbendazim, thiabendazole,fuberidazole, carbofuran, carbaryl and 1-naphtol, when going from second- tothird-order data. LODs obtained were ranged between 0.02 and 2.4 g L?1.