Julia G. Camilotti, Aloisi Somer, G. F. Costa, M. A. Ribeiro, Claudia Bonardi K. da Cruz, Gerson K. da Cruz, Sergio L. Gómez, Flavio L. Beltrame, Antonio Medina Neto, Francielle Sato, Nelson G. Castelli Astrath e Andressa Novatski

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy – Volume: 121; Pages: 719–723; DOI: 10.1016/j.saa.2013.11.099

In this work, the phase-resolved photoacoustic method was applied to provide specific information on the chemical assignments of paracetamol in the near-infrared region. Two broad bands, centered at 1370 and 1130 nm, were well-resolved using this method, making it possible to assign the peaks centered at 1398, 1355 and 1295 nm to a C–H combination from a CH3 structure and the peak at 1305 nm to a C–H combination from the aromatic ring. This information represents a new finding in chemical studies regarding this medicament.