Qualitative and Quantitative Analyses of Free Neutral Carbohydrates in Mushroon Tissues by Gas-Liquid Chromatography and Mass Spectroscopy

1971 ◽  
Vol 19 (6) ◽  
pp. 1272-1273 ◽  
Author(s):  
R. Barry. Holtz
Keyword(s):  
Liquid Chromatography ◽  
Mass Spectroscopy ◽  
Gas Liquid Chromatography ◽  
Qualitative And Quantitative ◽  
Quantitative Analyses

Thermal Degradation of Ethylene Propylene Rubber. C2-C6 Hydrocarbons as Thermal Decomposition Products of SKEP

1965 ◽  
Vol 38 (3) ◽  
pp. 674-676
Author(s):  
Ya M. Slobodin ◽  
V. E. Mayorova ◽  
A. M. Smirnova
Keyword(s):  
Thermal Decomposition ◽  
Liquid Chromatography ◽  
Thermal Degradation ◽  
Gas Liquid Chromatography ◽  
Decomposition Products ◽  
Ethylene Propylene ◽  
Qualitative And Quantitative ◽  
Thermal Decomposition Products ◽  
Ethylene Propylene Rubber

Abstract 1. Degradation of SKEP was carried out. 2. The qualitative and quantitative compositions of C2-C6 hydrocarbons in the products of degradation were established by gas-liquid chromatography.

scholarly journals Application of chemotaxonomy of leafy spurges (Euphorbia spp.) in biological control

1992 ◽  
Vol 70 (8) ◽  
pp. 1529-1536 ◽  
Author(s):  
Antony N. G. Holden ◽  
Paul G. Mahlberg
Keyword(s):  
United States ◽  
Biological Control ◽  
Liquid Chromatography ◽  
North America ◽  
South Dakota ◽  
Leafy Spurge ◽  
Gas Liquid Chromatography ◽  
Qualitative And Quantitative ◽  
Plant Sources ◽  
European Group

Triterpenoid profiles from latex of 56 accessions of European leafy spurges (Euphorbia spp.) were analyzed by gas–liquid chromatography. Qualitative and quantitative differences for components of the profiles were employed to distinguish between accessions. Triterpenoid profiles were diagnostic for the species, E. amygdaloides, E. agraria, E. cyparissias, E. lucida, and E. seguierana and were similar for each of these species in accessions collected from distant areas of Europe. By contrast, the 37 accessions of the E. esula complex were separated into 15 groups on qualitative and quantitative differences for components in the profiles. Identical profiles were detected among neighbouring accessions as well as those in collections from widely distant sites; conversely, different profiles also were identified for such collections. Profiles among these groups were compared with profiles of 39 United States (US) accessions of leafy spurge from Montana, Nebraska, North Dakota, and South Dakota. Profiles of US accessions, which were less variable than those from Europe, grouped into only 3 of the 15 European groups, whereas one US group could not be placed directly into a European group. This study demonstrates that latex analyses of European leafy spurges can distinguish between spurge populations and will identify potential plant sources of biocontrol agents for application against their leafy spurge counterparts in North America. Key words: leafy spurge, Euphorbia, latex, triterpenoids, gas–liquid chromatography.

Determination of Benzaldehyde in Wines and Amyl Acetate and Isoamyl Acetate in Liqueurs by Gas-Liquid Chromatography and Confirmation by Mass Spectroscopy

1975 ◽  
Vol 58 (3) ◽  
pp. 582-584
Author(s):  
Glenn E Martin ◽  
Peter C Buscemi ◽  
Boyd B Butts
Keyword(s):  
Liquid Chromatography ◽  
Mass Spectroscopy ◽  
Isoamyl Acetate ◽  
Liquid Extraction ◽  
Amyl Acetate ◽  
Alcoholic Beverages ◽  
Gas Liquid Chromatography ◽  
Liquid Liquid Extraction ◽  
Liquid Chromatographic

Abstract Liquid-liquid extraction was carried out prior to gas-liquid chromatographic (GLC) determination of amyl and isoamyl acetate in alcoholic beverages. The concentrations of amyl acetate and isoamyl acetate ranged from 4 to 29 and 2.5 to 322 ppm, respectively. Recovery studies for isoamyl and amyl acetate were carried out; these compounds were recovered at 90 and 92%, respectively. A liquid-liquid extraction also was carried out prior to the GLC determination of benzaldehyde. When chloroform was used in the liquid extraction, the results obtained by the GLC procedure compared favorably in most cases with those obtained by the ultraviolet spectrophotometric procedure. In the GLC method the benzaldehyde varied from 5 to 150 ppm for both imported and natural wines. The compounds in the effluent from the chromatograph, namely, amyl acetate, isoamyl acetate, and benzaldehyde, were confirmed by mass spectroscopy.

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