ISSN:
1436-5073
Keywords:
osmocene
;
osmium
;
flame photometric detector
;
gas chromatography-flame photometry
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Following gas chromatographic separation, bis(cyclopentadienyl) osmium (“osmocene”) can be selectively determined by a flame photometric detector. The luminescence is broad and spectrally complex, with the highest emission intensity observed in the red and near infrared. The minimum detectable amount (S/N=2) of osmocene is 0.5 ng or 0.15 pmol/s (0.2 ng by the IUPAC definition), and its linear range spans close to three orders of magnitude. The selectivity within linear range vis-à-vis naphthalene, through a 650-nm cut-on filter, is about 1.7 × 103 on a compound weight basis, or 4.3 × 104 on an elemental (mol Os/mol C) basis. The molar response ratios for the bis(cyclopentadienyl) derivatives of the iron group metals Fe ∶ Ru ∶ Os are approximately 3 ∶ 60 ∶ 1, at a set of conditions roughly suited to the simultaneous detection of all three elements in one chromatographic run.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01244492
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