The Analysis of Volatile Organic Compounds from Fresh and Dried Leaves of Vitex negundo by Thermal Desorption-Gas Chromatography

• Main Authors: Teotico, Denise G, Dancel, Maria Cristina A, Dayrit, Fabian M
• Format: text
• Published: Archīum Ateneo 2000
• Subjects: thermal desorption; gas chromatography; volatile organic compounds; Vitex negundo; Chemistry; Organic Chemistry
• Online Access: https://archium.ateneo.edu/chemistry-faculty-pubs/127; https://kimika.pfcs.org.ph/index.php/kimika/article/view/63
• Institution: Ateneo De Manila University

The generation and analysis of volatile organic compounds (VOCs) from fresh and dried leaves of Vitex negundo (lagundi) by thermal desorption-gas chromatography (TD-GC) is described. The leaves were heated at 80 to 120°C in a tube to release the VOCs. The VOCs were cryofocused into the gas chromatography (GC) column and analyzed. Five compounds were identified in the VOC by electron impact-MS and chemical ionization-MS analysis: β-phellandrene, hexenal, hexenol, octenol, and β-caryophyllene. The VOCs were quantified by flame ionization detection-GC. The profiles produced by TD-GC were compared with GC analysis of the oil obtained by steam distillation. TD-GC was found to be superior to steam distillation in its ability to differentiate fresh from dried leaves.