LAUSR

Identification of complex samples presents a difficult challenge for modern analytical techniques, and the differentiation among closely similar mixtures often remains indeterminate. In this paper, we designed a simplified cyclic chemiluminescence (CCL) system that is able to measure multistage signals in a single sample injection. The system was used to investigated the CCL reactions of the binary, ternary and multicomponent mixtures. Results showed that each mixture had a unique exponential decay equation (EDE) with a constant decay coefficient (k-value) to describe the change law of its multistage signals. Further studies found that different brands of liquor, beer, toner and baby powder have different k-values, the same brand of the commodities between different batches have the same k-values, which allows facile identification of these complex samples.We then used different catalysts to design digital codes of k-value for further improving the identifying ability of CCL.Moreover, the multistage signals like as fingerprints and could be used for linear discriminate analysis, which provides another complementary approach for identification of complex samples. Finally, we demonstrated that CCL shows potential applications in certification and quality assurance according to the change of the k-value of the sample. This work demonstrates that excellent discrimination ability of CCL for the identification of complex samples and provides a promising technology for quality assurance.