Tailoring of the chemical profile of volatile organic compounds in a combined drying/extraction process of Salvia officinalis L.

芳香药用植物在干燥过程中，精油以自由挥发物的形式在空气混合物中损失是不可避免的。对药用芳香植物生产加工商来说，干燥后植物中精油的保存是一个挑战和重要的任务。本文主要研究了鼠尾草干燥过程中挥发性空气混合物中含氧单萜和倍半萜以及碳氢化合物单萜和倍半萜的提取和提取。鼠尾草是世界上最重要的植物之一，用作烹饪草药和药用。在干燥过程中，相当数量的挥发性有机化合物蒸发到空气中，蒸发的程度取决于干燥温度、空气速度、产品粒度或机械损伤和干燥方法。不同干燥温度、不同干燥方法对鼠尾草干燥、挥发油混合物提取、干燥空气中挥发物的数量、质量及其相关化学成分的影响均未见报道。本研究的目的是确定闪蒸干燥对鼠尾草干燥后的颜色变化、挥发油含量和抗氧化活性的影响，并对挥发性干燥空气混合物中的挥发油进行提取和分析。干燥植物和挥发油混合物中挥发油的化学特征随干燥温度、空速和颗粒大小的变化而变化是基本的研究问题。闪蒸干燥方法将在实验室定制的干燥装置中进行。该装置将在自然地点附近制造，以便有新鲜的材料进行实验。测量期望结果的主要方法将集中于用加氢蒸馏Clevenger型仪器提取精油，用GC-MS分析精油，根据CIE L*a*b*等级对新鲜和干燥产品进行显微成像和颜色变化，并使用稳定的自由基DPPH根据供氢或清除自由基的能力来测量抗氧化活性。预期结果旨在建立干燥产品上的精油与挥发性空气混合物中精油的明确模型关系。在植物材料和挥发性空气混合物中裁剪所需的精油轮廓。

During the drying process of aromatic medicinal plants, essential oil losses in the form of free volatiles in the air mixture are inevitable. Preserving essential oil in the plant material after drying is a challenge and an important task for the medicinal aromatic plant producers and processors. Extraction and tailoring of the essential oil chemical profile such as oxygenated monoterpenes and sesquiterpenes and hydrocarbons monoterpene and sesquiterpenes in the volatile air mixture during drying in Salvia officinalis L. (Sage) is the main task of this proposal. Sage is one of the most important plants around the world used as a culinary herb and for medicinal purposes. During drying a considerable amount of volatile organic compounds are evaporating into the air and the degree of evaporation depends on drying temperature air velocity, product particle size or mechanical damage and drying method.No reports are available on Sage drying and essential oil extraction from volatile air mixture, quantity and quality of volatile in the drying air as well as their associated chemical composition when different drying temperatures or different drying methods are implemented. The objective of this study is to determine the flash drying effect of Salvia officinalis L. on the colour change, essential oil content and the antioxidant activity in the dried product as well as extracting and analysing the essential oil in the volatile drying air mixture. Tailoring of the essential oil chemical profile of the dried plants and essential oil in volatile air mixture as a function of drying temperature, airspeed and particle size is the fundamental research question. The flash drying method would be conducted in a laboratory custom designed drying device. The device will be fabricated near the natural site in order to have fresh material to conduct the experiments. The main methods for measuring the desired results would be focusing on essential oil extraction with hydrodistillation Clevenger –type apparatus, analysis of essential oil with GC-MS Analysis, conducting of microscopic imaging and colour change based on the CIE L*a*b* scale of fresh and dried products and the antioxidant activity will be measured in terms of hydrogen donating or radical scavenging ability by using a stable radical DPPH.Expected results are aiming at establishing a clear model relationship of essential oil on the dried product and the essential oil in the volatile air mixture. Tailoring of desired essential oil profile in the plant material and the essential oil in the volatile air mixture.