title: The phase-resolved photoacoustic method to indicate chemical assignments of paracetamol.
abstract: 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.
authors.affiliation: Departamento de Ciências Farmacêuticas, Universidade Estadual de Ponta Grossa, Av. General Carlos Cavalcanti 4748,CEP 84030-900 Ponta Grossa, PR, Brazil.
authors.forename: J G
authors.initials: JG
authors.lastname: Camilotti
authors.affiliation: Departamento de Física, Universidade Estadual de Ponta Grossa, Av. General Carlos Cavalcanti 4748, CEP 84030-900 Ponta Grossa, PR, Brazil.
authors.forename: A
authors.initials: A
authors.lastname: Somer
authors.affiliation: Departamento de Física, Universidade Estadual de Ponta Grossa, Av. General Carlos Cavalcanti 4748, CEP 84030-900 Ponta Grossa, PR, Brazil.
authors.forename: G F
authors.initials: GF
authors.lastname: Costa
authors.affiliation: Departamento de Física, Universidade Estadual de Ponta Grossa, Av. General Carlos Cavalcanti 4748, CEP 84030-900 Ponta Grossa, PR, Brazil.
authors.forename: M A
authors.initials: MA
authors.lastname: Ribeiro
authors.affiliation: Departamento de Física, Universidade Estadual de Ponta Grossa, Av. General Carlos Cavalcanti 4748, CEP 84030-900 Ponta Grossa, PR, Brazil.
authors.forename: C
authors.initials: C
authors.lastname: Bonardi
authors.affiliation: Departamento de Física, Universidade Estadual de Ponta Grossa, Av. General Carlos Cavalcanti 4748, CEP 84030-900 Ponta Grossa, PR, Brazil.
authors.forename: G K
authors.initials: GK
authors.lastname: Cruz
authors.affiliation: Departamento de Física, Universidade Estadual de Ponta Grossa, Av. General Carlos Cavalcanti 4748, CEP 84030-900 Ponta Grossa, PR, Brazil.
authors.forename: S L
authors.initials: SL
authors.lastname: Gómez
authors.affiliation: Departamento de Ciências Farmacêuticas, Universidade Estadual de Ponta Grossa, Av. General Carlos Cavalcanti 4748,CEP 84030-900 Ponta Grossa, PR, Brazil.
authors.forename: F L
authors.initials: FL
authors.lastname: Beltrame
authors.affiliation: Departamento de Física, Universidade Estadual de Maringá, Av. Colombo 5790, 87020-900 Maringá, PR, Brazil.
authors.forename: A N
authors.initials: AN
authors.lastname: Medina
authors.affiliation: Departamento de Física, Universidade Estadual de Maringá, Av. Colombo 5790, 87020-900 Maringá, PR, Brazil.
authors.forename: F
authors.initials: F
authors.lastname: Sato
authors.affiliation: Departamento de Física, Universidade Estadual de Maringá, Av. Colombo 5790, 87020-900 Maringá, PR, Brazil.
authors.forename: N G C
authors.initials: NG
authors.lastname: Astrath
authors.affiliation: Departamento de Física, Universidade Estadual de Ponta Grossa, Av. General Carlos Cavalcanti 4748, CEP 84030-900 Ponta Grossa, PR, Brazil. Electronic address: anovatski2@gmail.com.
authors.forename: A
authors.initials: A
authors.lastname: Novatski
mesh_terms: D000042:Absorption; D000082:Acetaminophen / Q000737:chemistry*; D061088:Photoacoustic Techniques / Q000379:methods*; D017550:Spectroscopy, Fourier Transform Infrared; D019265:Spectroscopy, Near-Infrared
chemical_list: D000082:Acetaminophen
keywords: NIR; Paracetamol; Phase-resolved photoacoustic