Fluorine-induced chemiluminescence detection of phosphine, alkyl phosphines and monophosphinate esters

Allium chemistry: Identification of natural abundance organoselenium volatiles from garlic, elephant garlic, onion, and Chinese chive using headspace gas chromatography with atomic emission detection

“…Structures were established by mass spectrometry (Figure 3), in most cases through comparison with spectra of synthetic samples prepared from bis(lV-benzotriazolyl) selenide (12, Scheme 1) (Ryan and Harpp, 1992;Ryan, 1988) and disulfide-diselenide interchange (Scheme 2) (Potapov et al, 1992). Compounds 4-6 have been previously found in nature (Soda et al, 1987;Evans et al, 1968;Chasteen et al, 1990;Chasteen, 1993); the mass spectrum of 5 agrees with that published (Chasteen, 1993). Distilled onion oil, analyzed by direct injection, as well as the headspace above chopped onion showed 7; in the case of onion oil, three other longer retention time Se compounds (possibly PrSSeSMe) were also seen, while in the case of Se-enriched onions (96 ppm of Se) 4, 5, and 10 were also found.…”

Dimethyl Sulfide Measurement by Fluorine-Induced Chemiluminescence

“…49 Such compounds could provide an interference inland (e.g., Central Valley of California, where Lake Kesterson has become enriched in Se and Te due to irrigation practices) but not over the oceans. The detector responds well to alkyl phosphines and monophosphinate esters such as some pesticides and nerve gases, 50 but these compounds are, again, not likely to be present at significant levels in the marine boundary layer.…”

Phototrophic bacteria produce volatile, methylated sulfur and selenium compounds

“…1 shows the head space gas composition of two cultures of Rhodocyclus tenu&, the first a control with no added selenium and tellurium, and the second with selenate added to the culture medium. Since fluorine-induced chemiluminescence is most sensitive to alkylated compounds containing sulfur, phosphorus, selenium and tellurium [3,6], all peaks seen in this chromatogram can be ascribed to alkylated species of these four elements. It is important to note that the detector is insensitive to non-alkylated gases such as hydrogen sulfide.…”