Efficiency of Recovery of the Bioactive Principles of Plants by Comparison between Solid-Liquid Extraction in Mixture and Single-Vegetable Matrices via Maceration and RSLDE.

The term "officinal" derives from the Latin and includes all medicinal, aromatic and perfume plant species, which have long been a subject of interest for multiple purposes: health, food, pharmacological, cosmetic and so on. In this work, a study on six different species of medicinal plants, particularly characterized by digestive, choleretic and diuretic properties, was carried out: rosemary ( Rosmarinus officinalis ), sage ( Salvia officinalis ), laurel ( Laurus nobilis ), gentian ( Gentiana lutea ), dandelion ( Taraxacum officinale ) and rhubarb ( Rheum palmatum ). The roots and aerial parts of plants were separately extracted with two different techniques-maceration and rapid solid-liquid dynamic extraction (RSLDE)-and the quali/quantitative analysis of active ingredients have been determined by applying dry residue, Folin-Ciocalteu and DPPH assays. Data obtained have provided useful answers regarding the efficiency of the extraction carried out on a mixture or on single plants, allowing us to evaluate the best choice according to the cases and the final uses.