Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
CONSTANCY OF SPECTRAL RESPONSE RATIOS IN THE FLAME PHOTOMETRIC DETECTOR
Autore:
SUN XY; AUE WA;
Indirizzi:
DALHOUSIE UNIV,DEPT CHEM HALIFAX B3H 4J3 NS CANADA DALHOUSIE UNIV,DEPT CHEM HALIFAX B3H 4J3 NS CANADA
Titolo Testata:
Journal of chromatography
fascicolo: 1-2, volume: 667, anno: 1994,
pagine: 191 - 203
Fonte:
ISI
Lingua:
ENG
Soggetto:
2-DIMENSIONAL CONDUCTOMETRIC DETECTION; GAS-CHROMATOGRAPHY; POSTSUPPRESSOR CONVERSION; ION CHROMATOGRAPHY; TRANSITION-METALS; ELUITE ACIDS; SELECTIVITY; HYDROCARBON; LUMINESCENCE; SPECIFICITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
30
Recensione:
Indirizzi per estratti:
Citazione:
X.Y. Sun e W.A. Aue, "CONSTANCY OF SPECTRAL RESPONSE RATIOS IN THE FLAME PHOTOMETRIC DETECTOR", Journal of chromatography, 667(1-2), 1994, pp. 191-203

Abstract

The response ratio of a chromatographic peak in two optically different channels of the flame photometric detector depends little if at allon the size of the peak (analyte concentration), as long as the latter remains within the linear range of both calibration curves. However,if wide wavelength ranges are monitored for analytes with multiple emitters of a different kinetic order (non-linear calibration curves), response ratios may become subject to variation. Such variation may also occur if multiple-emitter luminescence is variably quenched and/or if the linear range of the analyte is exceeded. These effects are demonstrated with compounds of Cr, Fe, Mn, P, Sn and, particularly, S. In contrast, if narrow ranges of properly selected wavelengths can be monitored -so that a single emitter predominates- the constancy of response ratios will be maintained even if heavy levers of a quencher and/or multiple emitters of different kinetic orders are present in the flame. For instance, the response ratios of sulfur remain constant under these circumstances both in the conventional quadratic and the novel linear response mode.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 14:43:55