Vanida Chairgulprasert, Boonsong Krisornpornsan, and Abdulhakim Hamad

pp. 321 - 326

Abstract

The pulp of longkong fruits (Aglaia dookkoo Griff.), collected from Narathiwat province, was dried and extracted by steam distillation to obtain the essential oil in 0.48% yield. The GC-MS data showed oleic acid (14.80%), α-copaene (11.15%), germacrene-D (9.16%), δ-cadinene (6.74%), τ -muurolol (6.34%), (+)
spathulenol (5.72%) and palmitic acid (5.49%) as the major constituents. Organic acids were also extracted from dried pulp with methanol using a Soxhlet apparatus to give the crude extract in 36.26% yield. Four organic acids: glycolic, maleic, malic and citric acids were determined by HPLC. Maleic acid (1.23%) was the major acid and the others were citric (0.22%), malic (0.15%) and glycolic acids (0.14%).