129 (1992). After gas-chromatographic separation as volatile organometallics, some transition elements were found to respond with analytically relevant sensitivities in the flame photometric detector. Their minimum detectable amounts, in mole of metal per second at an S/N,.,., ratio of 2, were 1 x lo-'' for nickel and 6 x 10-l3 for rhenium, as well as a less sensitive 2 x lo-'' for molybdenum and 3 x lo-'' for cobalt. (When divided by 3.7, these values yield the S / u = 3 limit of detection as recommended by IUPAC.) Calibration curves were established for these elements in comparison with transition metals already known to respond in the flame photometric detector. Their chemiluminescent spectra, together with that of chromium, were measured in the detector at analytically (as opposed to spectroscopically) optimized conditions. Atomic lines, molecular bands, and continua were all present. Also, the spectra produced by several types of carbon compounds were recorded for a definition of potential spectral interferences from hydrocarbonaceous sample matrices. The atomic lines and the massive continua displayed by certain metals are discussed in some detail. Atomic lines appear up to a limiting energy level of 3.6 eV above ground state. It is suggested that continua could arise from small, perhaps catalytically active particles. Also discussed, in accordance with a reviewer's request, are the analytical performance of the FPD compared to ICP and MIP sources, and the definition and influence of noise on measured performance criteria.XUN-YUN S U N , BRIAN MILLIER et WALTER A. AUE. Can. J. Chem. 70, 1129 (1992) On a trouvC que certains dements de transition, sCpar6s par chromatographie gazeuse sous le forme d'organomCtalliques volatils, peuvent repondre avec des sensibilites analytiquement acceptables dans un dttecteur photometrique a flamme. Les quantitks minimales detectables, en mole de metal par seconde, a un rapport de S/N,.,., de 2, sont de 1 X 10-l4 pour le nickel et de 6 X lo-'' pour le rhenium alors que des sensibilites plus faibles de 2 X lo-" et 3 x lo-'' ont Ct C dCterminCes respectivement pour le molybdkne et le cobalt. (Lorsqu'on divise ces valeurs par 7 , on obtient la limite de detection S / u = 3 recommandee par I'UICPA.) On a Ctabli des courbes de calibration de ces elements et on les a compare avec celles de metaux de transitions d6ja connus pour donner une reponse dans le detecteur photometrique flamme. Optrant dans des conditions analytiquement (par opposition 2 spec~roscopiquement) optimisees, on a mesure leur spectre de chimiluminescence ainsi que celui du chrome dans le dktecteur. Des raies atomiques, des bandes molCculaires et des continua sont presents dans tous les cas. De plus, dans le but de dCfinir les interfkrences spectrales potentielles dues a des matrices d'Cchantillons contenant des hydrocarbures, on a aussi enregistre les spectres de plusieurs types de composCs carbones On discute en detail des raies atomiques et des continua importants observes avec certains mCtaux. Les raies ato...
