Determination of volatiles using GC-MS from peel essential oils of various citrus varieties of Pakistani origin

Peel essential oil of citrus varieties, Malta (Citrus sinensis), grapefruit (C. paradisi), Kinnow (C. reticulata), Fewtrell's early (C. reticulata), Mosambi (C. sinensis), and Eureka lemon (C. limon) were evaluated by GC-MS technique, after extracting through cold expressing. The results delineated that limonene followed by myrcene and alpha-pinene were the main components. beta-Panasinsene, cc-bisabolol, and citronellal were also common volatiles identified as sesquiterpene, monoterpene alcohol and aldehyde. Among, monoterpenes, beta-pinene and gamma-terpinene were identified in Eureka lemon, gamma-muurolene in Fewtrell's early and pantaene in grapefruit. Sesquiterpenes including a-caryophyllene, gamma-elemene and 1,2,1-docosadiene were identified in Fewtrell's early, bisabolene and dimethyl, 1,3,6-octatrienein in Eureka lemon, cyclopentene in Kinnow and bergapten in grapefruit peel oils.