Objective  The entropy weight method and grey relative analysis method were used to evaluate the quality of Flos Caryophylli slices by multiple indexes.

Methods  The content of β-caryophyllene, α-caryophyllene, eugenol, aceteugenol and volatile ether extract in 25 batches of Flos Caryophylli slices from different areas was determined. Using grey relative analysis method, the weight of the entropy weight method was used as the resolution coefficient ρ to construct the quality research model of the slices.

Results  The content of aceteugenol in 25 batches of Flos Caryophylli slices was the largest, which suggested that the content might need to increase more indicative ingredients. The relative correlation degree of each evaluation unit sequence was 0.164-0.739, which indicated that the quality of Flos Caryophylli slices from different areas were different. The top three samples were Q15, Q17 and Q18 by quality ranking, and the producing area was Madagascar, which indicated that the quality of Flos Caryophylli slices from this area is better.

Conclusion  The comprehensive quality evaluation of Flos Caryophylli slices can be effectively evaluated by the entropy weight method and grey relative analysis method. Entropy weight method improves the reliability of grey relative analysis method and the scientificity of quality evaluation of Flos Caryophylli slices.

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