查询词典 acetonitrile

MethodsSeparation was performed on an Agilent ZORBAX SBC18 (4.6 mm×250 mm, 5 μm) analytical column with mobile phase consisting of acetonitrile and water with gradient elute at the flow rate of 1.0 ml/min and the column temperature 40℃.

色谱柱： Zorbax SBC18柱（250 mm×4.6 mm，5 μm），流动相∶乙腈水，检测波长：203 nm，柱温：40℃，流速：1.0 ml/min，分析时间：90 min。

The results show that among the acetoacetonate complexes,Co_3 has the best catalytic activity.The optimum reaction conditions were as follows:0.764 mmol of Co_3,mole fraction of ethanal 10%based on the substrate,room temperature,oxygen pressure 2 MPa,reaction time 11h and solvent acetonitrile.Under these conditions,13.3%p-chlorobenzaldehyde was obtained with 15.3%conversion and 87.2%selectivity.The oxidation can also be carried out without solvent with 8.1%conversion,89.1%selectivity and 7.2%yield respectively.

在金属配合物中Co_3的催化性能最好，在其用量为0.764 mmol、乙醛用量为反应物物质的量的10%、氧气压力为2MPa时，以乙腈为反应介质，室温下反应11h，反应的转化率和选择性可达15.3%，87.2%，对氯苯甲醛收率可达13.3%；反应也可在无溶剂时进行，此时反应的转化率、选择性及醛的收率分别为：8.1%，89.1%，7.2%。

Conductive polythiophene film was electrochemically deposited by direct oxidation of thiophene in boron thrifluoride diethyl etherate and in the mixed electrolyte of BFEE and acetonitrile.

用电化学方法分别在纯的三氟化硼乙醚离子溶液中，三氟化硼乙醚+乙腈溶液中在导电氧化锢锡ITO电极上成功聚合噻吩。

A simple NACE method has been developed for the assay of Rutaecarpine in Evodia rutaecarpa for the first time. Optimum separation of the analytes was obtained using a nonaqueous buffer system with 40 mmol/L ammonium acetate containing 30% acetonitrile and 10% acetate acid.

考察了影响电泳分离的各因素如缓冲溶液的浓度、用于调节酸碱度的乙酸的添加比例及用于调节电渗流的乙腈的添加比例，最后优化的分离缓冲溶液的组成是40 mmol/L NH4Ac 的甲醇溶液，其中含有30%的乙腈和10%的乙酸。

The VLE of ethanol-ethyl acetate and acetonitrile-toluene systems was investigated experimently and the result indicates that experimental result agrees well with that of molecular design.

针对两组物系的分子设计结果进行了汽液平衡实验，结果表明：实验结果与分子设计结果基本一致，设计过程有效。

A HPLC/ESI-MS method studied on relative compounds of chloramphenicol succinate ;Column:an Agilent ODS column 250×2.1mm;Mobile phase: 0.05M ammonium formicate buffer PH4.0/acetonitrile=80/20 ,flow0.2ml/min, and λ276nm;Mass:trap ion mass;source:ESI;Scan mode:negative ion scan.

液相色谱条件为色谱柱：Agilent C18 2.1mm×250 mm；流动相：流动相0.05M甲酸铵用甲酸调pH至4.0 /乙腈=80/20，流速0.2ml/ min，检测波长276nm；质谱条件为离子肼电喷雾质谱仪，离子源：ESI；检出模式：负离子检测。

Glyoxal in cosmetic sample was extracted by the solution of acetonitrile and water.

样品用乙腈－水溶液溶解，与2，4-二硝基苯肼在弱酸条件下衍生化反应，衍生物直接用HPLC测定，用外标法定量。

Ten batches of Cortex Moutan Carbonisatum were measured by HPLC with Paeonol as a reference substance and the HPLC analysis was performed on a Hedera ODS-3 Chromatographic Column(4.6 mm×150 mm,5 μm),with methanol to Acetonitrile(1∶1) and 0.5‰ trifluoroacetic acid solution as mobile phase in gradie...

以丹皮酚为参照物，对10批丹皮炭进行指纹图谱的分析。结果：建立了丹皮炭饮片的HPLC指纹图谱共有模式，标定了11个共有峰，10批炭品的相似度在0.830~0.991。结论：该指纹图谱方法简便、准确、重复性好，可专属性地研究丹皮炭的指纹图谱，为有效地控制该饮片的内在质量提供了科学依据。

Ten batches of Cortex Moutan Carbonisatum were measured by HPLC with Paeonol as a reference substance and the HPLC analysis was performed on a Hedera ODS-3 Chromatographic Column (4.6 mm×150 mm, 5 μm), with methanol to Acetonitrile (1∶1) and 0.5‰ trifluoroacetic acid solution as mobile phase in gradient mode and the detection wavelength was at 258 nm.

采用Hedera ODS-3柱(4.6 mm×150 mm，5 μm)，流动相甲醇-乙腈(1∶1)-0.5‰三氟乙酸水，梯度洗脱，检测波长258 nm。

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。

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。