冷却猪肉表面菌落总数的快速无损检测方法研究

研究了4℃冷链条件下,冷却猪肉在1~14 d贮藏期间,表面菌落总数与400~1 100 nm光谱范围内相应高光谱图像的关系,提出了一种基于高光谱技术的冷却猪肉表面菌落总数的快速无损检测方法。并采用多元线性回归和偏最小二乘回归两种统计分析方法分别建立预测模型,均得到较好的预测结果,其预测集相关系数RV分别为0.886和0.863。实验结果表明,利用高光谱技术可以较好地定量分析冷却猪肉表面的菌落总数,应用该技术对冷却猪肉品质安全进行快速无损评价是可行的。

A rapid nondestructive measurement method for assessing the total plate count on chilled pork surface

The present paper proposed a method based on the hyperspectral technology for rapidly, nondestructively quantify the total plate count on chilled pork surface. In the research, 50 chilled pork samples stored at 4 degrees C for 1-14 days were used to study the relationship between the total plate count on chilled pork surface and their hyperspectral images collected in 400-1 100 nm. Two models were established using MLR and PLSR methods, and the prediction showed that they can both give satisfactory results with R(v) = 0.886 and 0.863 respectively. The overall research demonstrates that the hyperspectral technology can well quantify the total plate count on chilled pork surface, and so indicates that it is a valid tool to assess the quality and safety properties of chilled pork in the future.