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Article Abstract
Carvone is an important flavoring substance and widely used in the food and chemical industries. Carvone has two optical isomers (L-carvone and D-carvone), which have different aroma characteristics. However, the green extraction of natural carvone and isolation of chiral carvone present challenges, leading to its limited application. In this study, a deep eutectic solvent (DES) was prepared and used as a green extraction solvent for the extraction of carvone from herbaceous plants, and then a chiral chromatography column combined with GC-MS was used for the separation and detection of L-carvone and D-carvone. Response surface methodology was used to optimize the extraction conditions including the volume of DES, extraction time and extraction temperature. The results showed that the extraction recoveries and intra-day precision ( = 6) were 83.5-101.3% and 3.2-6.1% when the volume of DES was 5 mL, and the extraction time and temperature were 25 min and 51 °C, respectively. The MLOD and MLOQ of L-carvone and D-carvone were 8.0 mg kg and 25.0 mg kg, respectively. The real sample detection results revealed that about 235.8-1600.0 mg kg of L-carvone was detected in L., and 6658.5-9788.6 mg kg of D-carvone in L. seeds. The established method can be an effective method for the detection of chiral carvone in herbaceous plants.
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