Abstract
A green and reliable method using supercritical fluid extraction (SFE) and molecular distillation (MD) was optimized for the separation and purification of standardized typical volatile components fraction (STVCF) from turmeric to solve the shortage of reference compounds in quality control (QC) of volatile components. A high quality essential oil with 76.0% typical components of turmeric was extracted by SFE. A sequential distillation strategy was performed by MD. The total recovery and purity of prepared STVCF were 97.3% and 90.3%, respectively. Additionally, a strategy, i.e., STVCF-based qualification and quantitative evaluation of major bioactive analytes by multiple calibrated components, was proposed to easily and effectively control the quality of turmeric. Compared with the individual calibration curve method, the STVCF-based quantification method was demonstrated to be credible and was effectively adapted for solving the shortage of reference volatile compounds and improving the QC of typical volatile components in turmeric, especially its functional products.
Highlights
Since the Japanese scientific academic community defined the class of “functional foods”—conventional and modified foods that included additional health benefits beyond basic nutrition in the early 1980s, the foods with health benefits became more and more popular in the daily diets of individuals [1]
Powder of Curcuma longa L. rhizome (Zingiberaceae), is widely used as a food additive, dietary supplement, and medicine [2,3]. It is officially documented as a medicine and food dual purposes items by the National Health Commission of the People’s Republic of China [4] and as Dietary Supplement by the United States Pharmacopeia (USP) [5]
In order to evaluate the method feasibility of the standardized typical volatile components fraction (STVCF)-based qualification of multiple analytes, i.e., quantitation accuracy of ar-curcumene, zingiberene, β-bisabolene, β-sesquiphellandrene, ar-turmerone, α-turmerone, and β-turmerone calculated by STVCF, percent difference (PD), and Cos (θ), cosine similarity between two vectors, were employed
Summary
Since the Japanese scientific academic community defined the class of “functional foods”—. Alternative methods without reference compounds are beneficial for the Molecular distillation (MD) or short path distillation is a comparatively new separation technology. It can separate liquid–liquid mixtures far loweristhan the boiling point the difference. Distillation, the distance between evaporating and condensing surfaces is less than the λ m of the Different substances can be separated from mixed components according to their λm (Figure 1) It is molecules involved [21]. Different substances can be separated from mixed components according to an appropriate method for the separation and purification of thermally unstable materials with low their λm (Figure 1). The feasibility and credibility of this methodology were further assessed with a developed fast GC-MS method
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