Effect of the carbon dioxide modifier on the lipid composition of wool wax extracted from raw wool

Wool wax or lanolin is a unique substance secreted by sheep and forms a natural protective coating on wool fibres. It is widely used in pharmaceutical and cosmetic formulations. However, different systems of wool wax recovery from scouring liquour provide a dark impurified greasy product. This product has a lipid composition that differs from the wool wax present on wool fibres. The wool wax extraction method from raw wool with pressurised CO₂ and different modifiers at constant pressure and temperature was studied. Thin-layer chromatography coupled to an automated flame ionisation detection system (TLC/FID) was used to analyse the different lipid classes present in the collected extracts. Moreover, a detailed structural comparison of the cholesteryl esters and hydroxycholesteryl esters was carried out by means of sub-ambient pressure chromatography mass spectrometry in the electron impact and in the ammonia positive chemical ionisation modes. For comparison, qualitative and quantitative analyses of the lanolin extracted in Soxhlet with dichloromethane and commercial cosmetic lanolin were carried out. Differences in the quantity of wool wax extraction and in the lipid composition of different wool wax extracts were detected by changing the modifier polarity.     

紫茉莉根挥发油成分分析

为鉴定紫茉莉根挥发油的化学成分,按2000年版中国药典规定的方法提取挥发油,采用气相色谱-质谱联用仪分析了紫茉莉根挥发油的化学成分。结果表明,从紫茉莉根中提得0.12%的挥发油,鉴定了其中23种化合物,这些成分均为首次从紫茉莉根中分离鉴定,为进一步研究紫茉莉根的化学成分提供有益的补充。     

七里香蔷薇精油化学成分的研究

用毛细管气相色谱法分离七里香蔷薇花精油中的各种组份，用GC/MS和Kvoats指数对各种组份进行鉴定，共定性出31种化合物，其中以正十一烷、正十九烷、十九烷-1、正二十三烷为主要成分。     

毛菊苣种子精油化学成分的气相色谱-质谱法分析

研究毛菊苣种子精油的化学成分并为进一步的生理活性的研究打下基础,以水蒸气蒸馏法提取毛菊苣种子的精油,并进行GC-MS仪器分析,用面积归一化方法测定其含量。分离得到24个化合物,对所有分离得到的化合物进行鉴定,鉴定率达100%。通过毛菊苣种子精油化学成分的研究,为开发和利用这一维吾药用植物提供了科学依据。