Identification of secondary metabolites in medicinal and spice plants by NIR-FT-Raman microspectroscopic mapping
Identification of secondary metabolites in medicinal and spice plants by NIR-FT-Raman microspectroscopic mapping
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作者：
Baranska, M;Schulz, H;Popp, J
本文展示了特殊的潜在的振动近红外FT拉曼显微光谱的研究茴香水果，甘菊花序和姜黄根，以获得详细的信息，其微观结构和化学组成。茴香果实的显微拉曼图谱表明，茴香脑，这是主要的精油成分，存在于整个茴香中，在果实的顶部浓度最高。精油细胞的原位测量结果主要是在1657 cm（-1）和1609 cm（-1）处观察到的两条带，这是茴香脑的特征。甘菊花序的拉曼图像显示，螺醚，由2150和2250 cm（-1）之间的显着带确定，积累在花头的中部。由于姜黄根的拉曼光谱中有强烈的姜黄素谱带，因此可以清楚地确定这种染色物质的分布;在根的中心观察到姜黄素的最高浓度。
This paper demonstrates the special potential of vibrational NIR FT Raman microspectroscopy for the study of fennel fruits, chamomile inflorescence and curcuma roots to obtain detailed information about their microstructure and chemical composition. Microscopic Raman maps of fennel fruits demonstrate that anethole, which is the main essential oil component, is present in the whole mericarp with highest concentration at the top of the fruit. In situ measurements obtained of the essential oil cells are dominated by two bands observed at 1657 cm(-1) and 1609 cm(-1) which are characteristic for anethole. Raman images of chamomile inflorescence show that spiroethers, identified by significant bands between 2150 and 2250 cm(-1), are accumulated in the middle part of the flower head. Due to the intense curcumin bands in the Raman spectrum of curcuma root, the distribution of this dyeing substance can be clearly determined; highest concentration of curcumin was observed on the core of the root.