caa a22 4500 465745873 CHVBK 20180323111820.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00323119 doi (NATIONALLICENCE)springer-10.1007/BF00323119 Evaluation of vague infrared spectra using the cross-covariance function [Elektronische Daten] [K. Doerffel, U. Kreher] Summary: The information provided by the ir-spectrum of a mixture-sample to be analyzed can be used at a high level by calculating the cross-covariance function (ccvf) ψxy(k) using the ir-spectrum of a reference sample. For qualitative analysis this function is calculated in the wide range of −100<k<+100. The presence of the analyte is indicated by a global maximum of ccvf at k=0. The reference spectrum should be a binary mask derived from the spectrum of the pure analyte. For quantitative analysis the value of ccvf ψxy(k=0) is proportional to the content of the analyte in the sample to be analyzed. Ccvf is calculated only in the range −3<k<+3 using the real spectrum as a reference. The practicability of this procedure was proved by evaluating ir-spectra for the analysis of polyethylene samples. The experiments show that the analysis is possible even in the case of low resolved or very noise spectra. Springer-Verlag, 1990 Doerffel K. Department of Chemistry, Technical University "Carl Schorlemmer" Leuna-Merseburg, DDR-4200, Merseburg, German Democratic Republic aut Kreher U. Department of Chemistry, Technical University "Carl Schorlemmer" Leuna-Merseburg, DDR-4200, Merseburg, German Democratic Republic aut Fresenius' Journal of Analytical Chemistry Springer-Verlag 336/6(1990-01-01), 486-489 0937-0633 336:6<486 1990 336 216 https://doi.org/10.1007/BF00323119 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00323119 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Doerffel K. Department of Chemistry, Technical University "Carl Schorlemmer" Leuna-Merseburg, DDR-4200, Merseburg, German Democratic Republic aut NATIONALLICENCE 700 1- Kreher U. Department of Chemistry, Technical University "Carl Schorlemmer" Leuna-Merseburg, DDR-4200, Merseburg, German Democratic Republic aut NATIONALLICENCE 773 0- Fresenius' Journal of Analytical Chemistry Springer-Verlag 336/6(1990-01-01), 486-489 0937-0633 336:6<486 1990 336 216 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer