乙腈

Oxidation of alkenes catalyzed by metalloporphyrin imidazolium salts in the presence of N-hydroxyphthalimide and isobutyraldehyde as co-catalysts provided the epoxidation product at room temperature. And the solvent with a weak coordinating ability such as acetonitrile gave the best result.

金属紫质咪唑盐於烯类的氧化催化反应上，若与NHPI及异丁醛共催化，可在室温进行环氧化反应，反应溶剂选择具有弱配位能力的乙腈，则可获得较佳结果。

Starting with commercial available tosylmethyl isocyanide and but-2-enoic methyl ester, pyrrolo[2,1-f][1,2,4]triazine derivatives was prepared by twelve-steps process in total yiled of 5.0%~8% via pyrrole and pyrrolo [2,1-f] [1,2,4] triazine ring formation, substitution and amination reactions etc.

本文以简单的对甲基苯磺酰甲基乙腈和反-2-丁烯酸为原料，经过形成吡咯，吡咯并[2，1-f][1，2，4] 三嗪环，取代，酰胺化等等12步反应，合成了结构新颖的吡咯并[2，1-f][1，2，4] 三嗪衍生物，总收率达5%～8%。

Previously,these reactions were performed in dry acetonitrile which was manipulatively complex and environmentally unfriendly.

以前报道的此类反应，都是在有毒的有机溶剂，如乙腈中进行的，而且需要加入分子筛以除去反应体系中的水。

F. Nees and their metabolites by HPLC, the mobile phase was acetonitrile-water (0.1% methanoic acid) for gradient elution, Column temperature was 25℃, flow rate was 1.0mL/min, the detection wavelength was at 254nm..

采用HPLC对穿心莲及其代谢产物进行研究，以乙腈-0.1%甲酸水进行梯度洗脱，柱温为25℃，流速为1.0mL/min，检测波长为254nm。

Methods A LiChrospher RP-C_(18)(250 mm×4.6 mm,i.d.5μm)column was used and the mobile phase was acetonitrile-water (1.0% methanoic acid)for gradient elution.

采用LiChrospher RP- C_(18)(250mm×4.6mm，i.d.5μm)色谱柱，以乙腈-水(1.0%甲酸)为流动相，梯度洗脱，双波长检测。

Using UPLC system,WATERS ACQUITY UPLC BEH C~(18)(2.1 mm×50 mm,1.7μm) column and the mobile phase of 1% methanoic acid solution-acetonitrile with the flow rate of 0.6 mL·min~(-1),the determination wavele...

使用 UPLC 色谱系统，BEH C~(18)色谱柱(2.1mm×50mm，1.7μm)；流动相为1%甲酸溶液—乙腈；流速为0.6mL·min~(-1)；检测波长为280nm。

The process was methanolysis ed alkyl inino-acetic acid ester hydrogen chloride salt from methyl-cyanide.

研究了由乙腈为原料经烷基亚氨基醋酸酯盐酸盐醇解制备原乙酸三甲酯的工艺方法，对投料比、反应温度、反应时间及中和指示剂等工艺条件进行了研究，得出较优惠的工艺条件。

The application of the microchemical method to the sample preparation accelerates determination.

应用微量化学法技术处理样品，提高了分析速度。样品用乙腈提取，提取液过C18微柱净化。

MethodsHPLC was used.The stationary phase was Spherixorb C18column.The moble phase was acetonitrilewater(60∶40).The UV detection wavelength was 345 nm.

方法采用高效液相色谱法，C18色谱柱为固定相，乙腈水（60∶40）为流动相，检测波长为345 nm。

The separation was achieved within 4 min using a BEH Shield RP18 column (100 mm 2.1 mm, 1.7 μm) with 50 mmol/L monoammonium phosphate solution (pH 6.5) and acetonitrile as the mobile phase.

以BEH Shield RP18柱(100 mm 2.1 mm，1.7 μm)为分析柱，以50 mmol/L的磷酸二氢铵(pH 6.5)和乙腈为流动相进行梯度洗脱，3种磷酸腺苷在4 min内实现了较好的分离。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。