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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/71037
Title: 
Espectrofotometria de longo caminho óptico em espectrofotô metro de duplo-feixe convencional: uma alternativa simples para investigações de amostras com densidade óptica muito baixa
Other Titles: 
Long optical path length spectrophotometry in conventional double-beam spectrophotometers: A simple alternative for investigating samples of very low optical denshy
Author(s): 
Institution: 
Universidade Estadual Paulista (UNESP)
ISSN: 
  • 0100-4042
  • 1678-7064
Abstract: 
We describe the design and tests of a set-up mounted in a conventional double beam spectrophotometer, which allows the determination of optical density of samples confined in a long liquid core waveguide (LCW) capillary. Very long optical path length can be achieved with capillary cell, allowing measurements of samples with very low optical densities. The device uses a custom optical concentrator optically coupled to LCW (TEFLON® AF). Optical density measurements, carried out using a LCW of ̃ 45 cm, were in accordance with the Beer-Lambert Law. Thus, it was possible to analyze quantitatively samples at concentrations 45 fold lower than that regularly used in Spectrophotometric measurements.
Issue Date: 
15-Jun-2009
Citation: 
Quimica Nova, v. 32, n. 2, p. 488-492, 2009.
Time Duration: 
488-492
Keywords: 
  • Light concentrator
  • Liquid core waveguide (LCW)
  • Very long path length
Source: 
http://dx.doi.org/10.1590/S0100-40422009000200036
URI: 
Access Rights: 
Acesso aberto
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/71037
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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