【摘 要】
：
One of the most important trends in chemical and biotechnology is an increasing demand for enantiomerically pure substances such as drugs, food additives, a
【机 构】
：
595 North Harrison Road, Bellefonte, PA 16823,USA
【出 处】
：
DaLian Internationall Symposia and Exhibition on Chromatogra
论文部分内容阅读
One of the most important trends in chemical and biotechnology is an increasing demand for enantiomerically pure substances such as drugs, food additives, agrochemicals and reagents for research.The most versatile, convenient and accurate technique for the determination of the enantiomeric composition of volatile and semivolatile samples is chiral gas chromatography using capillary columns.High resolution, sensitivity and speed make chiral capillary gas chromatography ideal for the analysis of natural products and other complex mixes.The most versatile and popular commercial stationary phases are prepared using alpha, beta or gamma cyclodextrins that have been functionalized with various derivative groups at the 2, 3 and 6 positions on the sugar molecules.In this study we will compare and contrast the unique selectivity provided by cyclodextrins that have been derivatized with a variety functional groups such as trifluoroacetyl, permethyl, dimethyl, diacetyl and other unique derivatives.
其他文献
The extended temperature range of the new ZebronTM HT InfernoTM columns offer distinct high temperature advantages over conventional fused silica capillary
The high cost of crude oil combined with the need for cleaner, renewable motor energy has renewed interest in the use of modified vegetable oils as diesel f
As a kind of new sample preparation technique, solid-phase microextraction (SPME) possesses several advantages and has been widely used for the extraction o
随着居民生活水平的不断提高,贷款买车正成为一种潮流,据《经济观察报》报道,汽车消费贷款最近两年已经成为继房地产信贷之后,我国消费信贷领域的又一大亮点。以前,消费者要
Independent component analysis (ICA) is a statistical signal processing technique that aims at recovering the source signals under the assumption that the s
广州国际美食博览中心名盛广场(下简称名盛广场)作为北京路步行街规模最大、功能最完善的商业航母,近期开始公开发售招租。名盛广场占地面积1.6万平方米,总建筑面积达14万平
“健康住宅”是2003年北京楼市的关键词之一,对于普通购房者它意味着低容积率、高绿化、通风、采光等回归自然的“境界”。2004年始,“节能”、“环保”、“生态”、“零排
该股的盈利动能得分由上周的-41.88上调至本周的28.21,盈利动能由负转正是河北钢铁本次新入选I66的主要原因。近一周内华泰证券将其2011年盈利预测由0.22元调高至0.30元。
T
美国纽约天才儿童艾莉雅?沙伯(Alia Sabur)小学4年级时直接跳级,进入石溪纽约州立大学就读,今年二月获韩国一所大学聘为专任教授,时年仅18岁,成为史上最年轻的教授。沙伯是19
Perfumes are complex mixtures characterized by fragrant essential oils and aroma components, fixatives, as well as solvents.The objective of their employmen