DETERMINATION OF COMPONENTS AND PHYSICO-CHEMICAL INDEXES OF FRESH ONION LEAF ESSENTIAL OIL IN HAI DUONG PROVINCE

DOI: 10.18173/2354-1059.2023-0030

Abstract

This study aimed to primarily analyze the components and physicochemical indexes of the essential oil of fresh onion leaf collected from Kinh Mon District, Hai Duong Province. By GC-MS method, 39 components in the essential oil of fresh onion leaf have been identified. In which, there are ten out of them were hydrocarbons (such as monoterpenes 11.58%, sesquiterpenes 4.02%) and the rest were oxygenated ones (like aldehydes 14.87%, alcohols 45.64%, ketones 4.43%, esters 1.24%, acid 1.37%, oxide 1.69% and others 13.36%). The density of essential oil was 0.82, the acid index was 0.67 (mgKOH\g) and the ester index was 0.74 (mgKOH\g).