查询词典 chromatographic

In Chapter 1, the ubiquity of chiral phenomena and its important role in various disciplines, the methods for enantiomer separation, the principles of direct chromatographic separation of enantiomers and the status of chiral CGC are discussed and/or reviewed.

第一章论述或评述了手性特征的普遍性和在众多学科中的重要性、手性分离方法、色谱直接分离手性化合物对映体的基本理论、手性气相色谱研究现状。

Ursodeoxycholic acid and its epimer chenodeoxycholic acid in synthetic products were determined by thin layer chromatographic scanning.

熊胆是名贵稀有的中药材，其主要成分熊去氧胆酸是溶解胆出醉结石的首选药物。

Application of the thin layer chromatographic method to the determination of ergometrine, ergotamine and ergotoxine in ergot has been studied.

本文研究了应用无粘合剂氧化鋁薄层层离和光电比色相結合的方法，測定麦角中三种主要生物碱的含量。

We reported previously the separation of ergot alkaloids by paper chromatographic method.

在以前的紙层离工作基础上，拟定出麦角新碱、麦角胺与麦角毒碱的紙层离定量方法。

In chapter 3, the chromatographic fingerprint of Erigeron breviscapus herbal sample was investigated and established by using many extract methods and optimizing experimental conditions.

内容包括提取溶剂的选择，色谱条件的优化及方法学考察等，使建立的色谱指纹图谱具备系统性、特征性和稳定性。

The proposed method surpassed other chromatographic alternatives in terms of limit of detection at least 10~3 folds with good reproducebility. Chapter 4 A capillary zone electrophoresis with indirect LIF detection method is developed for the simultaneous determination of six coumarin compounds (esculin, esculetin, isofraxidin, genistein, naringin and sophoricoside).

第四章建立了一种毛细管区带电泳—间接激光诱导荧光检测法同时测定6种黄酮类化合物(秦皮甲素、秦皮乙素、异秦皮定、染料木素、柚皮苷和槐角苷)的新方法，扩大了LIF检测的应用范围。

A new technology, Supercritical Fluid CO_2 Extraction, was also supplied to study the plant. The technological parameter was optimal. Total extract of SFE-CO_2 were 4.86 times of the essential oil extracted by SDE, main active extracted constituents were 1.36% high than SDE. The chemical constituents of SFE-CO_2 were also analyzed by GC-MS. 57 constituents were identified, 29 constituents of them were first discovered. 24 constituents were discovered in two extract. Fingerprint is a good technology to elevate the quality of herb medicine. The main active fraction can be extracted by SDE and SFE, Fingerprint was studied respective, chromatographic parameter was acquired. 22 peaks were assigned common peaks in the spectrum of essential oil, 17 peaks were assigned to common peaks in the spectrum of SFE extract.

采用现代共性关键技术超临界CO_2萃取技术，通过正交试验，优选了超临界CO_2提取牛至挥发油的工艺，并与传统的水蒸气蒸馏法进行了比较研究，结果显示：前者提取有效部位的收率为后者的4.87倍，主要有效成分的转移率是后者的1.36倍；采用GC-MS分析方法和NIST质谱库检索，对SFE和SDE所提化学成分进行比较，SFE分离鉴定了57种化合物，占提取物总含量的86.96％，其中29种化合物为首次从该植物中鉴定；后者分离鉴定了69个化合物，占提取物总量的98.28％，其中27种化合物为首次从该植物中鉴定；两种方法的提取物中共有成分25种，包括主要有效成分麝香草酚、香荆芥酚、对聚伞花素等。

A gas chromatographic-mass spectrometric method for the simultaneous determination of environmental estrogens (including 4-nonylphenol, bisphenol A,diethylstilbestrol and 17α-ethinylestradiol) and endogenous estrogens (including 17α-estradiol, 17β-estradiol, estriol and estrone) in urine and bed mud is reported.

报道了尿及河底泥中环境雌激素(壬基酚、双酚A、己烯雌酚、17α-乙炔基雌二醇)和内源性雌激素(17α-雌二醇、17β-雌二醇、雌三醇、雌酮)的气相色谱-质谱测定法。

The operating principle, use method, characteristics and application situation of SAFE ethane chromatographic analyzer are introduced.

介绍了 SAFE 乙烷色谱分析仪的工作原理、使用方法、特点以及应用情况。

When using ethyl alcohol as the solvent of the extract, some chromatographic peak shapes became abnormal.

试样以乙醇为溶剂时，会导致某些色谱峰的峰形不好。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。