title: Interference-free determination of Sudan dyes in chilli foods using second-order calibration algorithms coupled with HPLC-DAD.
abstract: This paper presents a new method for the determination of Sudan dyes contained in hot chilli samples. The method employs second-order calibration algorithms to handle the recorded data. The second-order calibration algorithms are based on the popular parallel factor analysis (PARAFAC), alternating trilinear decomposition (ATLD) and self-weighted alternating trilinear decomposition (SWATLD), respectively. These chemometric methodologies have the second-order advantage, which is the ability to get accurate concentration estimates of interested analytes even in the presence of uncalibrated interfering components. The results on a set of spiked chilli test shows that low contents of Sudan I and Sudan II in complex chilli mixtures can be accurately determined using the new method. The sample preparation was based on solvent extraction, and internal standard was not required. Quantification was carried out with simple mobile phase.
authors.affiliation: State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, PR China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Hai-Long
authors.initials: HL
authors.lastname: Wu
authors.forename: A-Lin
authors.initials: AL
authors.lastname: Xia
authors.forename: Qing-Juan
authors.initials: QJ
authors.lastname: Han
authors.forename: Hui
authors.initials: H
authors.lastname: Cui
authors.forename: Ru-Qin
authors.initials: RQ
authors.lastname: Yu