Ml. Scheepers et al., DETERMINATION OF FREE MELAMINE CONTENT IN MELAMINE-FORMALDEHYDE RESINS BY RAMAN-SPECTROSCOPY, Vibrational spectroscopy, 9(2), 1995, pp. 139-146
We have shown that Raman spectroscopy can be used to determine the fre
e melamine content in melamine-formaldehyde (MF) resins. In contrast t
o the conventional liquid chromatography method, the Raman spectroscop
ic method can be directly applied to cured resins without sample prepa
ration. The necessary assignments of bands were supported by theoretic
al analysis of Raman frequencies. In addition, Raman imaging was used
to determine the homogeneity of the free melamine content in cured MF
resins.