查询词典 acetonitrile

Results: we got the highest 18F-FDG productivity (55%) and radiochemistry purity (93%) with 0.2ml K2CO3, 0.3ml BMI, 0.7ml acetonitrile and TATM 25mg.

结果：采用25mg TATM在0.2ml K2CO3、0.3ml离子液体体积、0.7ml乙腈时获得最高的合成效率(55%)和放射化学纯度(93%)。

For determination the content of isomaltooligosaccharide in beverage, a high performance liquid chromatography method was established by using 300 mm×4 6 mm, 5 μm Hypersil NH 2 column, acetonitrile+water=78+22 as mobile phase, detector was diffeential refractometer with 40℃ internal temprature.

为测定饮料中异麦芽低聚糖的含量，建立了使用 30 0mm× 4 6mm ，5 μmHypersil NH2 柱，乙腈+水=78+ 2 2为流动相，内部温度为 4 0℃的示差检测器的高效液相色谱法。

Methods The background electrolyte was 50 mmolL^(-1) sodium borate containing 5% acetonitrile. The voltage was 12 kV and the wavelength was set at 228 nm. The fingerprint, produced from electropherograms of ten different batches of samples, was established and 11 common peaks were confirmed.

以的50 mmolL^(-1)硼砂（含体积分数为5%的乙腈溶液）为背景电解质，运行电压12 kv，紫外检测波长228 nm，以10个不同产地药材的电泳图谱建立了甜瓜蒂毛细管电泳指纹图谱。

Liquid-phase epoxidation of allyl chloride with hydrogen peroxide was carried out over Ti-MWW, a novel titanosilicate with the MWW structure, to synthesize epichiorohydrin selectively and effectively. Ti-MWW proved to be superior to the conventional TS-1 catalyst in both catalytic activity and product selectivity. Ti-MWW prefers aprotic solvents of acetone and acetonitrile, both of which can restrain the solvolysis of epichiorohydrin, whereas TS-1 favors a protic solvent of methanol.

研究了具有MWW结构的新一代钛硅分子筛Ti-MWW催化剂对烯丙基氯液相环氧化高效合成环氧氯丙烷的催化性能结果表明，Ti-MWW的催化活性以及产物选择性均优于传统的钛硅分子筛TS-1，对于Ti-MWW，合适的溶剂为非质子性溶剂丙酮和乙腈，在该溶剂中环氧化物不易发生溶剂化开环反应；而对于TS-1，合适的溶剂是质子性溶剂甲醇，但甲醇可导致醇醚副产物的生成。

A method for the determination of 12 sulfonamides (sulfanilamide, sulfamonomethoxine, sulfacetamide, sulfamethoxazole, sulfadiazine, sulfisoxazole, sulfathiazole, sulfadimethoxine, sulfamerazine, sulfaquinoxaline, sulfamethazine, sulfanitran) in cosmetics was developed by ultra performance liquid chromatography with photodiode array detector. The chromatographic column used was Acquity UPLCTM BEHC C18 (50 mm×2.1 mm, 1.7 μm) and the mobile phase was acetonitrile-0.1% formic acid aqueous solution.

建立了采用超高效液相色谱-二极管阵列检测器测定化妆品中12种常见的磺胺抗生素(磺胺，磺胺间甲氧嘧啶，磺胺醋酰，磺胺甲基异唑，磺胺嘧啶，磺胺二甲异唑，磺胺噻唑，磺胺二甲氧嘧啶，磺胺甲基嘧啶，磺胺喹啉，磺胺二甲嘧啶，磺胺硝苯)的方法。

Photoinduced tautomerization of DMBDK in acetonitrile was studied by means of UV and fluorescence spectroscopy.

通过紫外和荧光光谱研究了DMBDK在乙腈溶液中的光致互变异构行为，结果表明，荧光光谱可用于跟踪某些β-二酮化合物的互变异构过程。

Methods: Glipizide gliclazide glyburide glimepiride gliquidone repaglinide nateglinide pioglitazone rosiglitazone metformin phenformin and tolbutamide added in the blank ground samples were extracted with 80% methanol and were separated from an ACQUITY UPLC DBH C18 column with a gradient mobile phase of acetonitrile - 0.2 % formic acid water solution. A tandem quadrupole mass spectrometer equipped with electrospray ionization source was used in positive ion mode multiple reaction monitoring was performed to quantify above mentioned compounds.

被添加在中成药制剂及其包装物中的二甲双胍、苯乙双胍、罗格列酮、吡格列酮、格列吡嗫娶瑞格列奈、甲苯磺丁脲、格列齐特、格列苯脲、那格列奈、格列美脲、格列喹酮等西药成分用80%甲醇提取，以乙腈- 0.2%甲酸水溶液为流动相梯度洗脱，在ACQUITY UPLC DBH C18色谱柱上分离，串联四级杆质谱检测，MRM方式采集并定量。

The company produces boron trifluoride acetonitrile and family of products based on technology Zhejiang Huangyan chemical synthesis, the plant is the first production of boron trifluoride etherate, one of the manufacturers, with thirty years of history, there is a group engaged in research boron trifluoride and a group of experts with practical experience of staff.

本公司生产三氟化硼乙腈及系列产品的技术主要依托浙江黄岩合成化工厂，该厂是全国最早生产三氟化硼乙醚的厂家之一，具有三十多年的历史，有一批从事研究三氟化硼的专家和一批具有实际操作经验的工作人员。

I was founded in 2005, is a professional Chemical Industry Co., Ltd, Main BF3 acetonitrile complex, boron trifluoride diethyl ether complex, boron trifluoride DMC complex and Inorganic chemical raw materials, pharmaceutical intermediates.

我公司成立于2005年，是一家专业的化工实业有限公司，主营三氟化硼乙睛络合物、三氟化硼乙醚络合物、三氟化硼碳酸二甲酯络合物及无机化工原料、医药中间体。

With 1-methylte-trazole-5-thiol and 7-ACA as the material and acetonitrile-boron trifluoride complex as Catalysts, 7-TMCAHCl was preparated and the yield could reach 91.80%.

以1-甲基－5-巯基四氮唑和7-ACA为原料，三氟化硼乙腈配合物为催化剂合成了7-TMCA盐酸盐，反应收率可达91.80%。

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。