ABSTRACT

The decay curves of the delayed luminescence of egg yolks after excitation with white, yellow and blue light were investigated, using fluorescence excitation spectroscopy (FES), and the relationships to the origin of the eggs were examined. FES measurements were done by exciting the sample with light of defined wavelengths, representing the colours white (w), blue (bl) and yellow (ye), and the subsequent photon emission was detected. A total of 147 samples (each sample consisted of 10 eggs) were analysed, which originated from samples collected directly from the farm as well as from retail markets. Classification by partitioning and Tukey HSD tests were used to show differences between the origin of the eggs. It was shown that the induced emission of the conventional eggs was different compared with that of the organic eggs, which was reflected especially in the long-time emission parameters R40-w and R80-ye/bl, with lower values for conventional samples. Classification was possible with the parameters R40-w and R80-ye/bl, allowing correct classifications of 91.8% and 95.9% of the samples, respectively.

摘要

采用荧光激发光谱法（FES）研究了白光、黄光和蓝光激发后蛋黄延迟发光的衰减曲线，并考察了与鸡蛋来源的关系。FES 测量是通过用定义波长的光激发样品来完成的，代表颜色为白色 (w)、蓝色 (bl) 和黄色 (ye)，并检测到随后的光子发射。共分析了 147 个样本（每个样本由 10 个鸡蛋组成），这些样本来自直接从农场和零售市场收集的样本。分区分类和 Tukey HSD 测试用于显示鸡蛋来源之间的差异。结果表明，常规鸡蛋的感应发射与有机鸡蛋的感应发射不同，这尤其反映在长期发射参数 R40-w 和 R80-ye/bl 中，常规样品的值较低。使用参数 R40-w 和 R80-ye/bl 可以进行分类，分别允许对 91.8% 和 95.9% 的样本进行正确分类。