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Sensors 2016, 16(8), 1216; doi:10.3390/s16081216

Quantitative Determination of Fluorine Content in Blends of Polylactide (PLA)–Talc Using Near Infrared Spectroscopy

1
Department of Life Science and Biotechnology, University of Ferrara, Via L. Borsari, Ferrara 46 | 44121, Italy
2
Lab Control Srl, Chemical Analysis and Technological Services, Via Cà Donà, San Martino di Venezze, Rovigo 545 | 45030, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: W. Rudolf Seitz
Received: 26 May 2016 / Revised: 27 July 2016 / Accepted: 28 July 2016 / Published: 2 August 2016
(This article belongs to the Section Chemical Sensors)
View Full-Text   |   Download PDF [2386 KB, uploaded 2 August 2016]   |  

Abstract

Near-infrared spectroscopy (NIRS) has been widely used for quantitative and/or qualitative determination of a wide range of matrices. The objective of this study was to develop a NIRS method for the quantitative determination of fluorine content in polylactide (PLA)-talc blends. A blending profile was obtained by mixing different amounts of PLA granules and talc powder. The calibration model was built correlating wet chemical data (alkali digestion method) and NIR spectra. Using FT (Fourier Transform)-NIR technique, a Partial Least Squares (PLS) regression model was set-up, in a concentration interval of 0 ppm of pure PLA to 800 ppm of pure talc. Fluorine content prediction (R2cal = 0.9498; standard error of calibration, SEC = 34.77; standard error of cross-validation, SECV = 46.94) was then externally validated by means of a further 15 independent samples (R2EX.V = 0.8955; root mean standard error of prediction, RMSEP = 61.08). A positive relationship between an inorganic component as fluorine and NIR signal has been evidenced, and used to obtain quantitative analytical information from the spectra. View Full-Text
Keywords: PLA; polylactide; talc; fluorine; blends; near infrared spectroscopy; quantitative calibration PLA; polylactide; talc; fluorine; blends; near infrared spectroscopy; quantitative calibration
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Tamburini, E.; Tagliati, C.; Bonato, T.; Costa, S.; Scapoli, C.; Pedrini, P. Quantitative Determination of Fluorine Content in Blends of Polylactide (PLA)–Talc Using Near Infrared Spectroscopy. Sensors 2016, 16, 1216.

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