Analysis of the chemical constituents of Thompson atemoya seed oil

Abstract The objective of this study was to characterize the chemical composition in extracts of atemoya (var. Thompson) seed oil by spectrometric methods. The following extraction methods were performed: chemical extraction using hexane, mechanical extraction using a press, and partitioned extraction. The composition of each of the extracts was analysed by gas chromatography-mass spectrometry (GC-MS), and more than 100 compounds were identified. The major constituents of the hexane extraction were (Z)-hexadec-9-enal (49.42%) and triolein (23.28%), and the mechanically obtained extract contained elaidic acid (66.11%) and stearic acid (8.81%). In the partitioned extraction, the hydromethanolic fraction contained dihydroxyacetone (19.16%), 3-deoxy-d-mannoic lactone (16.34%), 5-hydroxymethylfurfural (10.77%), and 3-propanediol, 2-(hydroxymethyl)-2-nitro (9.89%); the hexane fraction contained gamma-sitosterol (31.73%), erucic acid (14.64%), stigmasterol (13.30%) and triolein (10.90%); the chloroform fraction contained gamma-sitosterol (22.11%), vaccenic acid (15.49%), triolein (14.65%) and stigmasterol (10.65%); and the ethyl acetate fraction contained (Z)-icos-9-enoic acid (31.28%), beta-sitosterol (16.29%), pentadecanoic acid (11.53%) and eicosanoic acid (8.01%). Resumo O objetivo deste trabalho foi caracterizar a composição química do óleo de semente de atemoia var. Thompson através de métodos espectrométricos. Foi realizada extração química utilizando hexano, extração mecânica utilizando prensa e uma extração particionada. A composição de cada uma das extrações foi analisada por CG/EM e mais de 100 compostos foram identificados. Os constituintes majoritários de cada extração foram hexano: (Z)-hexadec- 9-enal (49,42%) e trioleína (23,28%); prensa: ácido elaídico (66,11%) e ácido esteárico (8,81%). Na extração particionada, tem-se as frações hidrometanólica: diidroxiacetona (19,16%), lactona 3-desoxi-d-mannóica (16,34%), 5-hidroximetilfurfural (10,77%), 3-propanodiol, 2-(hidroximetil)-2-nitro (9,89%); hexânica: gama-sitosterol (31,73%), ácido erúcico (14,64%), estigmasterol (13,30%) e trioleína (10,90%); clorofórmica: gama-sitosterol (22,11%), ácido vacênico (15,49%), trioleína (14,65%) e estigmasterol (10,65%); acetato de etila: ácido (Z)- icos-9-enóico (31,28%), beta-sitosterol (16,29%), ácido pentadecanóico (11,53%) e ácido icosanóico (8,01%).