Abstract
Photoacoustic rapid-scan FT-IR spectroscopy was used to collect spectra of paper samples printed with mineral- and vegetable-oil-based inks at different concentrations. Partial least-squares (PLS) analysis and principal component analysis (PCA) were combined to form a model that, with data collected in the 3600-3200, 3000-2800, and 1800-1000 cm(-1) spectral regions, enables one to predict the concentration of ink in printed samples. Prediction is statistically robust provided the selected optical path difference (OPD) velocities are within the range 0.05-1.00 cm/s.
| Original language | English |
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| Pages (from-to) | 2259 - 2265 |
| Number of pages | 7 |
| Journal | Analytical Chemistry |
| Volume | 79 |
| Issue number | 6 |
| Publication status | Published - 2007 |