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

在芳香药用植物的干燥过程中，挥发油在空气混合物中以游离挥发物的形式损失是不可避免的。对于药用芳香植物的生产者和加工商来说，在干燥后保存植物精油是一项挑战和重要任务。丹参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、单萜和倍半萜等精油化学成分的提取和定制是本提案的主要任务。鼠尾草是世界上最重要的植物之一，用作食用药和药用。在干燥过程中，挥发性有机化合物大量挥发到空气中，蒸发的程度取决于干燥温度、风速、产品颗粒大小或机械损伤以及干燥方法。目前还没有关于鼠尾草干燥和挥发性空气混合物中挥发油提取的报道，以及不同干燥温度或不同干燥方法下干燥空气中挥发性物质的数量和质量及其相关化学成分的报道。本研究的目的是测定丹参闪蒸干燥对干燥产品的色泽变化、精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。作为干燥温度、风速和颗粒大小的函数来定制干燥植物和挥发性混合空气中的挥发油的挥发油化学轮廓是基本的研究问题。闪蒸干燥方法将在实验室定制设计的干燥设备中进行。该装置将在自然场地附近制造，以便有新的材料来进行实验。测定结果的主要方法是采用水蒸气蒸馏式清洗器提取挥发油，用气相色谱-质谱仪分析挥发油，对新鲜和干燥的产品进行显微成像和颜色变化的CIE L*a*b*标度，用稳定的自由基DPPH从供氢能力或清除自由基的能力来衡量抗氧化活性。预期结果旨在建立挥发油对干燥产品和挥发性混合物中挥发油的清晰模型关系。在植物原料中定制所需的精油轮廓，并在挥发性空气混合物中定制精油。

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.