title: Characterisation of calamansi (Citrus microcarpa). Part II: volatiles, physicochemical properties and non-volatiles in the juice.
abstract: Calamansi juices from three countries (Malaysia, the Philippines and Vietnam) were characterised through measuring volatiles, physicochemical properties and non-volatiles (sugars, organic acids and phenolic acids). The volatile components of manually squeezed calamansi juices were extracted using dichloromethane and headspace solid-phase microextraction, and then analysed using gas chromatography-mass spectrometry/flame ionisation detector, respectively. A total of 60 volatile compounds were identified. The results indicated that the Vietnam calamansi juice contained the highest amount of volatiles. Two principal components obtained from principal component analysis (PCA) represented 89.65% of the cumulative total variations of the volatiles. Among the non-volatile components, these three calamansi juices could be, to some extent, differentiated according to fructose and glucose concentrations. Hence, this study of calamansi juices could lead to a better understanding of calamansi fruits.
authors.affiliation: Food Science and Technology Programme, Department of Chemistry, National University of Singapore, Science Drive 2, Singapore 117543, Singapore.
authors.forename: Mun Wai
authors.initials: MW
authors.lastname: Cheong
authors.forename: Danping
authors.initials: D
authors.lastname: Zhu
authors.forename: Jingting
authors.initials: J
authors.lastname: Sng
authors.forename: Shao Quan
authors.initials: SQ
authors.lastname: Liu
authors.forename: Weibiao
authors.initials: W
authors.lastname: Zhou
authors.forename: Philip
authors.initials: P
authors.lastname: Curran
authors.forename: Bin
authors.initials: B
authors.lastname: Yu
mesh_terms: D001628:Beverages / Q000032:analysis*; D002957:Citrus / Q000737:chemistry*; D005638:Fruit; D008401:Gas Chromatography-Mass Spectrometry; D052617:Solid Phase Microextraction; D055549:Volatile Organic Compounds / Q000032:analysis* / Q000302:isolation & purification
chemical_list: D055549:Volatile Organic Compounds