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USE OF SPECTRAL SEARCH FOR IDENTIFICATION OF THE VOLATILES IN A SYNTHETIC MEAT FLAVOR SYSTEM (1980)

HSIEH, Y. P. C. ; PEARSON, A. M. ; SWEELEY, C. C. ; [et al.]

Oxford, UK : Blackwell Publishing Ltd

Journal of food science 45 (1980), S. 0

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ISSN: 1750-3841

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology

Notes: Volatiles from a synthetic meat flavor mixture were isolated and concentrated using the Likens-Nickerson apparatus. After separation by gas chromatography-mass spectrometry (GC-MS), the spectra were fed into a forward spectral-search computer program containing the spectra of over 70,000 catalogued compounds. Tentative identifications were made of the following compounds: 1-undecene, 2,4-dimethyl-undecane, 2,2,4-trimethyl-heptane, acetyl pyrrolidine, furna, 2,2,5,5,-tetramethyl tetrahydrofuran, 2-methyl-thiophene, 2,2-dimethyl-3,4-pentadienal, methylethyl ether, 2-butyl-1-octanol, 2,4-bis-(methyl-butyl)-phenol, and 5-methyl-2-furfural. Four of these compounds have not been identified in meal volatiles. The spectral-search procedure offers many advantages for identification of flavor volatiles, but could be further refined by using only classes of compounds believed to be involved in meat flavor development.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1365-2621.1980.tb07523.x

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Automated metabolic profiling analysis of urinary steroids by a gas chromatography mass spectrometry data system (1983)

Vrbanac, J. J. ; Sweeley, C. C. ; Pinkston, J. D.

Chichester : Wiley-Blackwell

Biological Mass Spectrometry 10 (1983), S. 155-161

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ISSN: 0306-042X

Keywords: Chemistry ; Analytical Chemistry and Spectroscopy

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: A computer system (MSSMET), using methylene unit retention indices for an off-line reverse library search analysis of selected ion chromatograms from gas-liquid chromatographic mass spectrometric data, has been applied for the qualitative and quantitative determination of daily variations in the excreted levels of urinary steroids of two individuals, using capillary column gas-liquid chromatography. Aliquots of 24 h urine collections and morning spot urine samples were examined. The daily excretion pattern of most of the major steroid metabolites was fairly consistent from day to day (i.e. 3α-hydroxy-5α-androstane-17-one, androsterone; 3α-hydroxy-5β-androstane-17-one, etiocheolanolone; 3α, 17α,21-trihydroxy-5β-pregnane-11,20-dione, THE; 3α,11β,17α,21-tetrahydroxy-5β-pregnane-20-one, THF; 3α,11β,17α,21-tetrahydroxy-5α-pregnane-20-one; allo-THF; 3α,17α,20α,21-tetrahydroxy-5β-pregnane-11-one, cortolone; 3α,17α,20β,21-tetrahydroxy-5β-pregnane-11-one, β-cortolone; 5β-pregnane-3α,11β,17α,20α,21-pentol, cortol; 5β-pregnane-3α,11β,17α,20β,21-pentol,β-cortol), while certain other steroid metabolites had a less consistent excretion pattern (3β-hydroxy-5-androstene-17-one, for example). Advantages and disadvantages of using capillary columns for the automated metabolic profile analysis of urinary steroids by reverse library search of selected mass chromatograms.

Additional Material: 3 Ill.