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根据西维因水解物具有强荧光的特性,提出了利用三维荧光光谱技术结合偏最小二乘回归(PLSR)法测定鸭肉中西维因的残留含量。通过对样品的二维等高线光谱图分析,发现鸭肉和西维因的特征峰能明显区分开,在西维因-鸭肉体系中两者波峰分别位于300/365 nm和320/460 nm,再利用PLSR法建立鸭肉中西维因残留含量预测模型,其预测集中真实值与预测值的决定系数R2和均方根预测误差值Prms分别达到0.9883和3.103。结果表明三维荧光光谱技术结合PLSR法可用于鸭肉中西维因残留的测定,具有快速检测和预测精度高等优点,为鸭肉中农药残留检测提供了一种有效的手段。
According to the strong fluorescence of cedar hydrolysates, we proposed the determination of the residual content of cinnabar in duck by three-dimensional fluorescence spectroscopy combined with partial least squares regression (PLSR). Through the two-dimensional contour analysis of the sample, the characteristic peaks of duck meat and cydavine were clearly distinguished. The peaks of the two strains were located at 300/365 nm and 320/460, respectively nm. The PLSR method was used to establish the prediction model of mid-and-west vetiver residue in duck meat. The coefficient of determination R2 and the root-mean-square prediction error Prms of the true prediction value and prediction value were 0.9883 and 3.103, respectively. The results show that the combination of three-dimensional fluorescence spectroscopy and PLSR can be used to determine the residues of mid and western duck in duck, which has the advantages of rapid detection and high prediction accuracy. It provides an effective method for the detection of pesticide residues in duck meat.