title: Suitability of hyperspectral imaging for rapid evaluation of thiobarbituric acid (TBA) value in grass carp (Ctenopharyngodon idella) fillet.
abstract: The suitability of hyperspectral imaging technique (400-1000 nm) was investigated to determine the thiobarbituric acid (TBA) value for monitoring lipid oxidation in fish fillets during cold storage at 4°C for 0, 2, 5, and 8 days. The PLSR calibration model was established with full spectral region between the spectral data extracted from the hyperspectral images and the reference TBA values and showed good performance for predicting TBA value with determination coefficients (R(2)P) of 0.8325 and root-mean-square errors of prediction (RMSEP) of 0.1172 mg MDA/kg flesh. Two simplified PLSR and MLR models were built and compared using the selected ten most important wavelengths. The optimised MLR model yielded satisfactory results with R(2)P of 0.8395 and RMSEP of 0.1147 mg MDA/kg flesh, which was used to visualise the TBA values distribution in fish fillets. The whole results confirmed that using hyperspectral imaging technique as a rapid and non-destructive tool is suitable for the determination of TBA values for monitoring lipid oxidation and evaluation of fish freshness.
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510641, China.
authors.forename: Jun-Hu
authors.initials: JH
authors.lastname: Cheng
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510641, China; Food Refrigeration and Computerized Food Technology, Agriculture and Food Science Centre, University College Dublin, National University of Ireland, Belfield, Dublin 4, Ireland. Electronic address: dawen.sun@ucd.ie.
authors.forename: Da-Wen
authors.initials: DW
authors.lastname: Sun
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510641, China.
authors.forename: Hong-Bin
authors.initials: HB
authors.lastname: Pu
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510641, China.
authors.forename: Qi-Jun
authors.initials: QJ
authors.lastname: Wang
authors.affiliation: College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510641, China.
authors.forename: Yu-Nan
authors.initials: YN
authors.lastname: Chen
mesh_terms: D000818:Animals; D002347:Carps; D005504:Food Analysis / Q000379:methods*; D007091:Image Processing, Computer-Assisted; D016018:Least-Squares Analysis; D050356:Lipid Metabolism; D008460:Meat / Q000032:analysis*; D008962:Models, Theoretical; D015999:Multivariate Analysis; D009132:Muscles / Q000473:pathology; D010100:Oxygen / Q000737:chemistry; D019265:Spectroscopy, Near-Infrared; D013858:Thiobarbiturates / Q000737:chemistry*
chemical_list: D013858:Thiobarbiturates; C029684:thiobarbituric acid; D010100:Oxygen
keywords: Grass carp; Hyperspectral imaging; PLSR; TBA value; Wavelength selection