Miniature radio-frequency mobility analyzer as a gas chromatographic detector for oxygen-containing volatile organic compounds, pheromones and other insect attractants.
J Chromatogr A
; 917(1-2): 205-17, 2001 May 11.
Article
en En
| MEDLINE
| ID: mdl-11403471
ABSTRACT
A high electric field, radio-frequency ion mobility spectrometry (RF-IMS) analyzer was used as a small detector in gas chromatographic separations of mixtures of volatile organic compounds including alcohols, aldehydes, esters, ethers, pheromones, and other chemical attractants for insects. The detector was equipped with a 2 mCi 63Ni ion source and the drift region for ion characterization was 5 mm wide, 15 mm long and 0.5 mm high. The rate of scanning for the compensation voltages was 60 V s(-1) and permitted four to six scans to be obtained across a capillary chromatographic elution profile for each component. The RF-IMS scans were characteristic of a compound and provided a second dimension of chemical identity to chromatographic retention adding specificity in instances of co-elution. Limits of detection were 1.6-55 x 10(-11) g with an average detection limit for all chemicals of 9.4 x 10(-11) g. Response to mass was linear from 2-50 x 10(-10) g with an average sensitivity of 4 pA ng(-1). Separations of pheromones and chemical attractants for insects illustrated the distinct patterns obtained from gas chromatography with RF-IMS scans in real time and suggest an analytical utility of the RF-IMS as a small, advanced detector for on-site gas chromatographs.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Compuestos Orgánicos
/
Oxígeno
/
Feromonas
/
Cromatografía de Gases
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
J Chromatogr A
Año:
2001
Tipo del documento:
Article
País de afiliación:
Estados Unidos