The Combination of Vibrational Spectroscopy and Chemometrics for Analysis of Milk Products Adulteration

Figure 2

Raman spectra of milk powder and melamine measured using different penetration depth of milk samples prepared using “valley” nonfat milk (a) and “peak” whole milk (b). Plots A and C show the full spectra, while plots B and D show the enlarged spectra in the wavelength of 1466.3 nm [32].

(a)

(b)