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. Author manuscript; available in PMC: 2016 Apr 7.
Published in final edited form as: Analyst. 2015 Apr 7;140(7):2093–2100. doi: 10.1039/c4an01987c

Figure 5.

Figure 5

A) Comparison of raw NIR spectra from 2 mm thick cartilage with polystyrene (solid black) and without polystyrene (dotted black) along with polystyrene spectra (solid grey). Influence of polystyrene on NIR spectra of 2 mm cartilage in region 2 and region 3 is highlighted by arrows. B) Second derivatives of NIR spectra from 2 mm thick cartilage with polystyrene (solid black) and without polystyrene (dotted black) along with polystyrene spectra (solid grey) compared in region 1. The polystyrene spectrum was divided by a factor of 10 to bring all spectra on the same scale.