Title

Four-way data coupled to parallel factor model applied to environmental analysis: Determination of 2,3,7,8-tetrachloro-dibenzo-para-dioxin in highly contaminated waters by solid-liquid extraction laser-excited time-resolved Shpol'skii spectroscopy

Authors

Authors

H. C. Goicoechea; S. J. Yu; A. C. Olivieri;A. D. Campiglia

Comments

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Abbreviated Journal Title

Anal. Chem.

Keywords

POLYCYCLIC AROMATIC-HYDROCARBONS; ROOM-TEMPERATURE PHOSPHORIMETRY; FLUORESCENCE LIFETIME DETECTION; DIBENZO-P-DIOXINS; POLYCHLORINATED; DIBENZOFURANS; CHEMOMETRIC ANALYSIS; 2ND-ORDER ADVANTAGE; FIBEROPTIC; PROBE; HUMAN SERUM; SPECTROMETRY; Chemistry, Analytical

Abstract

This article reports the first application of parallel factor analysis to high-order instrumental data generated from Shpol'skii matrixes at liquid helium temperature. Third-order data arrays-consisting of excitation modulated wavelength time matrixes-are collected with the aid of a cryogenic fiber-optic probe, a tunable dye laser, and a multichannel system for phosphorescence detection. The multidimensional data formats are applied to the analysis of 2,3,7,8-tetrachloro-dibenzo-para-dioxin in water samples. The experimental procedure is rapid and environmentally friendly. Complete sample analysis is accomplished in less than 15 min with only 100 mu mu L of organic solvent (n-heptane). The feasibility to directly determine parts-per-trillion concentration levels of the target compound is demonstrated with heavily contaminated samples of unknown composition. The limits of detection, estimated from calibrations based on the univariate method and parallel factor analysis, are 0.060 and 0.092 ng(.)mL(-1), respectively; both referred to a 100 mL water sample.

Journal Title

Analytical Chemistry

Volume

77

Issue/Number

8

Publication Date

1-1-2005

Document Type

Article

Language

English

First Page

2608

Last Page

2616

WOS Identifier

WOS:000228605100043

ISSN

0003-2700

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