Fig. 7
Appearance (left) and NIR spectra (right) of mixture consisting of CLBCr and moisturizer ((a) Propeto®, (b) HRDOW and (c) HRDWO) after centrifugation . Appearance: One drop of methylene blue (MB) aqueous solution (1.0 w/v%) or Sudan III liquid paraffin solution (1.0 w/v%) was added prior to mixing. NIR spectra: The horizontal axis indicates the wave number (4000–8000 cm− 1). The vertical axis represents absorbance. Each spectra has been shifted vertically to improve visibility