Разработка и регистрация лекарственных средств (Feb 2019)
DETERMINATION OF THE OPTIMAL EXTRACTION CONDITIONS OF DANDELION HERB AND LARGE BURDOCK LEAF SPECIE BY METHODS OF MATHEMATICAL PLANNING OF A MULTIFACTORIAL EXPERIMENT
Abstract
Introduction. Use of medicinal species at home entails some inconvenience. Therefore, it is topical to obtain phytopreparations, in particular dry extracts, from medicinal plant raw materials. This ensures the maximum yield of a complex of biologically active substances, and simplifies the way of its application, dosing and storage. The department of pharmacy of the Altai State Medical University has developed a specie of the following composition: dandelion medicinal herb and large burdock leaf (1:1). On the basis of this species, a technology for obtaining the dry extract is being developed. Variety factors influence on the output of a complex of biologically active substances from plant raw materials: the technological properties of raw materials, the methods and conditions for carrying out the extraction process, and the equipment used.Aim. To determine the optimal conditions for extracting a specie of dandelion herb and a large burdock leaf.Materials and methods. To solve this problem, methods of mathematical planning of a multifactorial experiment have been used: simplex method of mathematical planning, incomplete factorial experiment of type 25-2 for compiling the equation of the response surface, the method of steep ascent (the Box – Wilson method) along the response surface. Based on the theoretical basis of extraction, parameters and factors of process optimization were chosen, intervals of their variation are indicated. Variable factors – shredding, the ratio of «raw materials : extractant», time of maceration, temperature and the number of maceration. The extraction was carried out by remaceration, aqua purificata serves as extractant. The parameter of optimization was the exhaustion of the specie of extractive substances. Results and discussion. As a result of the simplex method, a number of studies were carried out until the area of the supposed optimum was reached. To describe the experiment in the region of the optimum and to compose the equation of the response surface, an incomplete factor experiment of the type 25-2 were put. A linear equation of the extraction process were obtained and the adequacy of the work of the obtained mathematical model is proved. To refine the extraction conditions and establish the optimal extraction regime, the method of steep ascent on the response surface was used.Conclusion. As a result of the experiment, optimal extraction conditions were established: crushing – 2 mm, ratio «raw material : extractant» – 1:10, time of maceration – 30 minutes, number of maceration – 3, temperature – 100 °С. These results will be used in the development of technology and the technological scheme for obtaining the dry extract of the specie.
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