title: Determination of quality attributes in wax jambu fruit using NIRS and PLS.
abstract: The aim of this work was to develop an analytical method to predict total anthocyanins content (TAC) and total phenolic compounds (TPC) in intact wax jambu fruit [Syzygium malaccense (L.) Merryl et Perry] using near-infrared spectroscopy (NIRS) and partial least squares (PLS). The estimation accuracy was based on parameters such as root mean square error of prediction (RMSEP), correlation coefficients [calibration (rc) and prediction (rp) set] and ratio of performance to deviation (RPD). TAC, rp = 0.98, RMSEP = 9.0 mg L(-1) and RPD = 5.19 were attained using second derivative pre-treatment. TPC, rp = 0.94, RMSEP = 22.18 (mg gallic acid equivalents (GAE)/100g) and RPD = 3.27 (excellent accuracy) were also obtained using second derivative pre-treatment. These findings suggest that the NIRS and PLS algorithms can be used to determine TCA and TPC in intact wax jambu fruit.
authors.affiliation: Federal University of Rio Grande do Norte, Department of Chemical Engineering, 59072-970 Natal, RN, Brazil.
authors.forename: Thayna R
authors.initials: TR
authors.lastname: Viegas
authors.affiliation: Federal University of Rio Grande do Norte, Department of Chemical Engineering, 59072-970 Natal, RN, Brazil.
authors.forename: Ana L M L
authors.initials: ALML
authors.lastname: Mata
authors.affiliation: Federal University of Rio Grande do Norte, Department of Chemical Engineering, 59072-970 Natal, RN, Brazil.
authors.forename: Márcia M L
authors.initials: MML
authors.lastname: Duarte
authors.affiliation: Federal University of Rio Grande do Norte, Institute of Chemistry, PPGQ, Biological Chemistry and Chemometrics, 59072-970 Natal, RN, Brazil. Electronic address: kassiolima@gmail.com.
authors.forename: Kássio M G
authors.initials: KMG
authors.lastname: Lima
mesh_terms: D000872:Anthocyanins / Q000032:analysis; D063427:Food Quality; D005638:Fruit / Q000737:chemistry*; D019265:Spectroscopy, Near-Infrared / Q000379:methods
chemical_list: D000872:Anthocyanins
keywords: NIRS; PLS; Total anthocyanins content; Total phenolic compounds; Wax jambu