该结果对乙酰乙酸酯法合成假性紫罗兰酮的工业开发具有实用价值。
The results can be used to guide the engineering development for the synthesis of pseudoionone by this method.
本文介绍了用重氮转移法合成具有较大空间位阻的重氮乙酸二环己基甲酯、L- 薄荷酯和叔丁酯。
Synthesis of sterically hindered dicyclohexylmethyl, L menthyl and tert butyl diazoacetate by diazo transfer was described on this paper.
摘要目的：建立一种气相色谱法同时测定注射用青霉素钠中有机溶剂丁醇、乙酸乙酯、乙酸丁酯残留量的方法。
To found a method to detect the residual solvents of penicillin sodium for injection: butanol acetic ether and butyl acetate.
油脂部分依次以石油醚、苯、氯仿、乙酸乙酯、丙酮、乙醇为淋洗剂进行洗脱，利用红外光谱、核磁共振光谱法对所分离组分进行了结构鉴定。
The compositions of grease were eluted with petroleum ether, benzene, chloroform, ethyl acetate, acetone, ethanol and characterized by means of IR and NMR spectroscopy.
乙酸丁酯稀释丙烯酸树脂后，用气相色谱法使丙烯酸树脂中的各种残余单体得到较好分离，再采用氢火焰离子化检测器(FID)定量测定。
Acrylic resin is diluted in ethyl acetate and the remnant monomer is well separated from it by gas chromatography and is quantificationally measured by hydrogen flame ionization detector (FID).
建立了基于手性毛细管柱直接测定丙烯酮醇和丙烯酮乙酸酯对映体含量的气相色谱法。
A gas chromatographic method was developed to directly determine the enantiomers of acrylic ketone alcohol and acrylic ketone acetate.
方法：（1）以硅胶柱色谱法，乙酸乙酯-石油醚梯度洗脱，自何首乌中提取分离二苯乙烯苷单体成分。
Methods: (1)To separate stilbene glycoside by using silica gel column chromatography with gradient elution consisting of ethyl acetate and petroleum ether.
以硫氢酸铵络合钴离子，随后用乙酸丁酯进行萃取，利用分光光度法测量光亮镀镍溶液中的钴离子。
Spectrophotometric determination of cobalt in bright nickel plating bath was advanced with ammonium thiocyanate as complexing agent and butyl acetate as extracting agent.
论述了松节油与冰乙酸一步法合成乙酸松油酯工艺。
The technology of one step synthesis of terpinyl acetate from turpentine and glacial acetic acid is described.
通过铬酸氧化丙醇制酯法，研究在硫酸-乙酸体系中，乙酸丙酯及丙酸丙酯的形成机理，及相关影响因素。
Through chromium sour oxidize propyl alcohol system ester law study in sulphuric acid acetic acid system in, proply acetate and proply propanoate form mechanism, and related influencing factor.
采用高速逆流色谱法（HSCCC），以正己烷氯仿甲醇水组成二相系统作为固定相与流动相，对黄芪的乙酸乙酯粗提物进行了分离纯化。
Preparative high-speed counter-current chromatography (HSCCC) was used for the separation of calycosin and formononetin from the ethyl acetate extract of Astragalus membranaceus Bge.
指出了采用固体酸催化剂一步法合成乙酸松油酯应是今后研究工作的重点。
It is pointed out that the one-step process catalyzed by solid acid catalysts will become the focus of research works for terpinyl acetate synthesis.
方法青蒿经石油醚提取浓缩，浸膏经过硅胶柱，用不同配比的乙酸乙酯洗脱，用tLC法跟踪，UV法检测。
Methods Artemisinin is extracted with petroleum ether and pass column of silica gel and gradient elution with ethyl acetate, then it is tracked with TLC and detected with UV-VIS.
以反应精馏方式进行时，乙醇转化率、乙酸乙酯收率分别为94.09%和60.45%，明显高于普通蒸馏法，而乙醇转化为乙酸乙酯的选择性变化不大。
The results showed that the conversion rate of ethanol was 94.09%, the yield of ethyl acetate was 60.45%, obviously higher than conventional synthesis method, while the selectivity varied slightly.
前言：目的：建立一种气相色谱法同时测定注射用青霉素钠中有机溶剂丁醇、乙酸乙酯、乙酸丁酯残留量的方法。
Objective: to found a method to detect the residual solvents of Penicillin Sodium for Injection: butanol, acetic ether and butyl acetate.
采用硅胶、聚酰胺、葡聚糖凝胶LH-20柱层析法和制备薄层层析法对乙酸乙酯和正丁醇提取物进行了分离、纯化。
The ethyl acetate and n-butanol extraction were chromatographed on silica gel column, polyamide column, sephadex LH-20 column and preparing TLC, respectively.
综述了乙酸松油酯的合成研究现状，讨论了一步法和两步法合成工艺及相应的反应机理。
The present situation of terpinyl acetate synthesis has been reviewed. One-step and two-steps process for the synthesis of terpinyl acetate and relevant reaction mechanism are discussed.
方法：硅胶柱色谱法，乙酸乙酯-石油醚梯度洗脱，自何首乌中提取分离二苯乙烯苷单体成分。
Methods: (1) to separate stilbene glycoside by using silica gel column chromatography with gradient elution consisting of ethyl acetate and petroleum ether.
方法用高分辨液质联用分析法，对其甲醇提取物及二氯甲烷和乙酸乙酯混溶剂提取物进行了成分分析。
Method Methanol and mixed solvent of chloroform and ethyl acetate extracts from Cordyceps formosana were analyzed with HPLC-DAD-HRMS.
采用HPLC色谱法分别对不同产地菝葜及其近缘种的乙酸乙酯提取物进行了指纹图谱比较研究。
Use the HPLC chromatography to conduct the fingerprint of Smilax chinaL. from different places and parts, together with its close kinships.
方法原甲酸三乙酯与氰乙酸乙酯缩合，然后和羟乙基肼经环合、水解等一锅法合成5-氨基吡唑-4-甲酸，然后在亚硫酸钠存在条件下加热脱羧得到5-氨基-1-羟乙基吡唑。
METHODS 5-amino-1-hydroxyethyl pyrazole-4-carboylic acid was synthesized through condensation of ethyl cyanoacetate and triethyl orthoformate followed by one-pot methodology of cyclization, hydolysis.
指出了采用固体酸催化剂一步法合成乙酸松油酯应是今后研究工作的重点。
The effect of sulfating agents and preparation methods on the structure and properties of zirconium-based solid acid catalysts;
对西红花提取物的精制品进行了分析，定性分析采用薄层色谱法，以西红花甙-1、甙-2为对照品，乙酸乙酯-甲醇-水（100：16。
The qualitative analysis using thin layer chromatography which crocin-1 and crocin-2 as the check samples and the ethy1 acetate-methanol-water (100:16.
对西红花提取物的精制品进行了分析，定性分析采用薄层色谱法，以西红花甙-1、甙-2为对照品，乙酸乙酯-甲醇-水（100：16。
The qualitative analysis using thin layer chromatography which crocin-1 and crocin-2 as the check samples and the ethy1 acetate-methanol-water (100:16.
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