title: Headspace solid-phase microextraction gas chromatography-mass spectrometry determination of volatile compounds in different varieties of African star apple fruit (Chrysophillum albidum).
abstract: The volatile compounds in four selected African star apple fruit (Chrysophyllum albidum) varieties were isolated and identified using the headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography-mass spectrometry (GC-MS). A total of 59 compounds were identified. Application of the aroma extract dilution analysis (AEDA) to the aroma distillates from the fruits revealed 45 odour-active compounds in the flavour dilution (FD) factor range of 4-128. Among them, the highest odour activities (FD factors) were determined for methylhexanoate, acetophenone and ethyl dodecanoate. Moreover, aroma lipophilicity appears to reflect molecular conformation. Further analysis of the similarities and differences between the fruit varieties in terms of the key odourants by the application of PLS-DA and PLS-regression coefficient showed strong positive correlation between the very sweet/sweet varieties and 10 key odourants. The odourants included ethyl acetate, acetyl methyl carbinol, methylhexanoate, sabinene, p-cymene, methylbenzoate, ethylbenzoate, geraniol, cis-α-bergomotene, acetophenone, and ethyl dodecanoate.
authors.affiliation: Department of Food Technology, University Putra Malaysia, Serdang, UPM 43400, Malaysia. lasekan@food.upm.edu.my
authors.forename: Ola
authors.initials: O
authors.lastname: Lasekan
authors.forename: Alfi
authors.initials: A
authors.lastname: Khatib
authors.forename: Hanisah
authors.initials: H
authors.lastname: Juhari
authors.forename: Parveen
authors.initials: P
authors.lastname: Patiram
authors.forename: Seye
authors.initials: S
authors.lastname: Lasekan
mesh_terms: D005638:Fruit / Q000737:chemistry / Q000145:classification; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D009812:Odorants / Q000032:analysis; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification*; D029632:Sapotaceae / Q000737:chemistry* / Q000145:classification; D052617:Solid Phase Microextraction / Q000295:instrumentation / Q000379:methods*; D055549:Volatile Organic Compounds / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D010936:Plant Extracts; D055549:Volatile Organic Compounds
keywords: African star apple fruit; HS-SPME; PLS-DA; PLS-regression coefficient; Volatiles