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Anal Chem. 2002 Sep 1;74(17):4334-42.

Process analysis of recycled thermoplasts from consumer electronics by laser-induced plasma spectroscopy.

Author information

1
Institute of Hydrochemistry, Technical University of Munich, Germany.

Abstract

An experimental setup for direct elemental analysis of recycled thermoplasts from consumer electronics by laser-induced plasma spectroscopy (LIPS, or laser-induced breakdown spectroscopy, LIBS) was realized. The combination of a echelle spectrograph, featuring a high resolution with a broad spectral coverage, with multivariate methods, such as PLS, PCR, and variable subset selection via a genetic algorithm, resulted in considerable improvements in selectivity and sensitivity for this complex matrix. With a normalization to carbon as internal standard, the limits of detection were in the ppm range. A preliminary pattern recognition study points to the possibility of polymer recognition via the line-rich echelle spectra. Several experiments at an extruder within a recycling plant demonstrated successfully the capability of LIPS for different kinds of routine on-line process analysis.

PMID:
12236340
[Indexed for MEDLINE]

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