TY  - JOUR
A1  - Breuckmann, Michael
A1  - Wacker, Georg
A1  - Hanning, Stephanie
A1  - Otto, Matthias
A1  - Kreyenschmidt, Martin
T1  - Quantification of C, H, N and O in polymers using WDXRF scattering spectra and PLS regression depending on the spectral resolution
T2  - Journal of Analytical Atomic Spectrometry
N2  - A new approach to determine the elements carbon, hydrogen, nitrogen and oxygen (CHNO) in polymers by wavelength-dispersive X-ray fluorescence analysis (WDXRF) in combination with partial least squares (PLS) regression was explored. The quantification of CHNO was achieved by using the Rayleigh and Compton scattering spectra of an Rh X-ray tube from 84 different polymers. Concealed differences of the corresponding scattering spectra could be utilized to quantify CHNO in a multivariate manner. It was shown that the developed model was capable of determining these commonly non-measurable matrix elements in polymers using WDXRF. Furthermore, the influence of spectral resolution, which is given by the collimator and the crystal, on the prediction of CHNO was explored in this study. It was found that minimal spectral resolution led to the most accurate CHNO predictions. Information about matrix composition could be used to improve so-called semi-quantitative XRF methods based on fundamental parameters (FP) for the analysis of plastics, soil or other samples with high organic content.
KW  - X-ray fluorescence
KW  - Plastics
KW  - Quantification of "dark matrix" elements
KW  - PLS regression
Y1  - 2022
UR  - https://www.hb.fh-muenster.de/opus4/frontdoor/index/index/docId/14925
UR  - https://nbn-resolving.org/urn:nbn:de:hbz:836-opus-149252
SN  - 1364-5544
ER  -