紫丁香干花的超临界CO2萃取物化学成分分析

摘要

Dried flowers of Syringa oblata Lindl. Were extracted by supercritical CO2 and the extracts were separated in separators Ⅰ (8 Mpa,45 ℃ ) and Ⅱ (5 Mpa,35 ℃). The chemical compositions of the extract from the separators Ⅰ and Ⅱ were analysed by CC-MS. 21 Different compounds in the obtained extract from the separator I were identified and were mainly long-chain allcane (57.14 % ) with nonacosane and 2,6,10,14-tetramethyl hexadecane as major compounds. Forty compounds in the extract from the separator Ⅱ were identified and were mainly oxy-compounds with hexadecanoic acid and 9,12-octadecadienoic acid (Z,Z) as major components, such as alcohols, ketones, aldehydes, acids and esters accounting for 67. 5 %. The supercritical CO2 extracts can be separated in certain extent by die two-stage separation. Temperature and pressure are the key factors for the separation results.%利用超临界CO2萃取紫丁香干花,提取物在分离釜Ⅰ(8MPa,45℃)中进行第一级分离,再在分离釜Ⅱ(5 MPa、35℃)中进行第二级分离.通过GC-MS分析了两个分离釜中萃取物的化学成分并进行比较.从分离釜Ⅰ中所得萃取物中鉴定出21种成分,以长链烷烃为主(占57.14％),主要成分为二十九烷和2,6,10,14-四甲基十六烷；从分离釜Ⅱ所得萃取物中鉴定出40种成分,以含氧化合物为主,醇、酮、醛、酸、酯占67.5％,主要成分为十六烷酸和(Z,Z)-9,12-十八碳二烯酸.二级分离可使紫丁香干花超临界CO2萃取物得到一定程度分离,温度和压力是制约分离结果的关键因素.