An insight into key volatile compounds in acerola (Malpighia emarginata DC.) pulp based on their odour activity values and chemometric evaluation. Issue 48 (5th December 2018)

• Record Type: Journal Article
• Authors: Nogueira, Juliete Pedreira; Pires de Siqueira, Airla Carla; Dutra Sandes, Rafael Donizete; de Sousa Galvão, Mércia; Santos Leite Neta, Maria Terezinha; Narain, Narendra
• Is Part Of: Analytical methods. Volume 10:Issue 48(2018)
• Page Start: 5851
• Page End: 5866
• Publication Date: 2018-12-05
• Subjects: Chemistry, Analytic -- Periodicals; Analytical biochemistry -- Periodicals; Chemical laboratories -- Standards -- Periodicals; 543.1905
• DOI: 10.1039/c8ay01427b
• Languages: English
• ISSNs: 1759-9660

Abstract

Abstract : HS-SPME and purge-and-trap were employed for the extraction of volatiles from acerola pulp and suggested key aroma compounds by their OAVs. Abstract : The application of headspace solid-phase microextraction (HS-SPME) and dynamic headspace purge & trap (P&T) combined with gas chromatography-mass spectrometry and odor activity value was used to analyze volatile compounds from acerola ( Malpighia emarginata DC.) pulp in order to determine their key aroma compounds. Chemometric evaluation led to the selection of the most efficient fiber of 50/30 μm divinylbenzene-carboxen-polydimethylsiloxane in capturing volatile compounds. Optimum conditions for HS-SPME were established and a total of 70 compounds were identified in pulp by HS-SPME, while 69 compounds were identified by P&T. The most represented class of compounds in HS-SPME was esters, while in P&T, it was alcohols. Among the large number of compounds identified, the most abundant were 4-pentenyl hexanoate, 4-pentenyl butanoate, hexyl butanoate and 1, 4, 4, 7 a -tetramethyl-2, 4, 5, 6, 7, 7 a -hexahydro-1 H -indene-1, 7-diol in the extract by HS-SPME while 3-methyl-3-buten-1-ol, ethanol, 1, 4, 4, 7 a -tetramethyl-2, 4, 5, 6, 7, 7 a -hexahydro-1 H -indene-1, 7-diol and 4-pentenyl butanoate were in P&T. Based on this study in association with the odor activity values, the key aroma compounds of acerola pulp were ( Z )-β-ocimene, ( E )-β-ocimene, methyl butanoate, linalool, ( E )-β-ionone, ( E )-2-hexenal, decanal, ( E )-β-damascenone, methyl hexanoate, 3-methyl-3-buten-1-ol, heptanal, ethyl butanoate, ethyl hexanoate, 1-octen-3-ol and nonanal. These compounds are predominantly of fruity notes with the presence of sweet, herbaceous and fresh odors.