Portal de Periódicos da CAPES

Artigo Produção Nacional Revisado por pares

BIBTEX RIS

An open-ended photothermal cell for i n v i v o measurements

1987; American Institute of Physics; Volume: 61; Issue: 7 Linguagem: Inglês

10.1063/1.337890

1520-8850

Mauro Henrique de Paula, Marcelo A. Carvalho, L.C. Alves, Michel A. Aegerter,

Spectroscopy and Chemometric Analyses

A new photothermal open-ended cell particularly adapted for in vivo spectroscopic measurements is described. The detector is a transparent LiNbO3 crystal or a crystalline quartz transducer in direct contact with the sample. The cell can be attached to an optical fiber cable for light excitation. The cell has a high signal-to-noise ratio and its frequency variation is proportional to ω−1.16. In vivo and in vitro measurements performed on green leaf and carbon black samples are presented.