| Title: | Headspace gas chromatography-mass spectrometry: a fast approach to the identification and determination of 2-alkyl-3- methoxypyrazine pheromones in ladybugs |
| Author(s): | Cudjoe E; Wiederkehr TB; Brindle ID; |
| Address: | "Chemistry Department, Brock University, St. Catharines, Ontario, L2S 3A1, Canada" |
| ISSN/ISBN: | 0003-2654 (Print) 0003-2654 (Linking) |
| Abstract: | "Static headspace sampling technique coupled with gas chromatography and mass spectrometry was used to investigate the presence of volatile 2-alkyl-3-methoxypyrazines in three different species of ladybugs of the Coccinellidae family. The species investigated were Coccinella septempunctata, Harmonia axyridis and Hippodemia convergens. 2-isopropyl-3-methoxypyrazine (IPMP) was identified in all three species with detectable levels of 2-sec-butyl-3-methoxypyrazine (SBMP) and 3-isobutyl-2-methoxypyrazines (IBMP) in only Hippodemia convergens and Harmonia axyridis species. Relative amounts of 2-alkyl-3-methoxypyrazines based on body mass showed that Hippodemia convergens had the highest levels of all three methoxypyrazines and Coccinella septempunctata the least" |
| Keywords: | Animals Coleoptera/*chemistry Food Contamination Gas Chromatography-Mass Spectrometry/methods Pheromones/*analysis Pyrazines/*analysis Wine; |
| Notes: | "MedlineCudjoe, Erasmus Wiederkehr, Tara B Brindle, Ian D eng Research Support, Non-U.S. Gov't England 2005/01/25 Analyst. 2005 Feb; 130(2):152-5. doi: 10.1039/b410659h. Epub 2004 Dec 8" |
