Heated flow-cell for gas phase UV-Vis detector in gas chromatography of polycyclic aromatic hydrocarbons.

  1. Sanz-Vicente, I. 1
  2. Cabredo, S. 1
  3. Sanz-Vicente, F. 1
  4. Galbán, J. 2
  1. 1 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  2. 2 Universidad de Zaragoza
    info

    Universidad de Zaragoza

    Zaragoza, España

    ROR https://ror.org/012a91z28

Revista:
Chromatographia

ISSN: 0009-5893

Ano de publicación: 1999

Volume: 50

Número: 3

Páxinas: 202-208

Tipo: Artigo

DOI: 10.1007/BF02490652 SCOPUS: 2-s2.0-0032793475 WoS: WOS:000082210000010 DIALNET GOOGLE SCHOLAR

Outras publicacións en: Chromatographia

Repositorio institucional: lock_openAcceso aberto Editor

Resumo

A detection system for gas chromatography based on gas-phase, molecular absorption measurements is presented, in which the chromatographic column is directly joined to the spectrophotometer flow cell, without heated transfer lines. To maintain polyciclic aromatic hydrocarbons (PAHs) in the gas phase during detection an aluminium heater was constructed. A mixture of 13 PAHs was then separated and analyzed. Parameters affecting separation (temperature program and carrier gas flow) were studied and a program designed to modify the measurement wavelength during the chromatography. The analytical characteristics of each compound were calculated, obtaining detection limits 0.2-1.5 χ mL-1. Given that some compounds overlaped, it was necessary to resolve their peaks mathematicaly. Finally, the method was applied to a certified synthetic mixture, with good results.