查询词典 acetonitrile

The property of the lowest excited triplet states of xanthone in acetonitrile has been investigated by using time-resolved laser flash photolysis at 355nm. The transient absorption spectra and the quenching rate constants of the excited xanthone with several amines have been obtained.

用时间分辨的激光闪光光解的方法在乙腈溶剂中研究了呫吨酮的激发三重态的性质，并得到了呫吨酮激发三重态和胺类、醇类以及酚类反应的瞬态吸收光谱和猝灭速率常数。

The quantitation was monitored with an Inertsil ODS-3V column using a mobile phase of methanol- 0.3%acetic acid = 64:36 for TLM and acetonitrile- methanol - 0.3%acetic = 2:64:34 for Z detector set at 254nm.

对托美丁的分析方法是用Inertsil ODS-3V管柱，移动相则采甲醇： 0.3%醋酸为64： 36 ；而对佐美酸的定量亦用相同管柱，移动相为乙晴：甲醇： 0.3%醋酸为2： 64： 34，UV侦测器则同样设定为254 nm。

A quantitative method of alkaloidal monomers is established by HPLC/MS.The The sepatation was performed on a XTerraTM ODS column(5μm,4.6mm id×150mm) with acetonitrile -water-acetic ammonium as mobile phase at the flow –rate of 1mL/min.

建立了苦豆子中主要的生物碱单体含量的测定方法：HPLC-MS法，色谱柱选用XTerraTMODS Column(5μm，4.6mmid×150mm)；流动相为乙腈-水-乙酸铵，采用梯度洗脱，流速为1mL/min，柱温30℃；质谱作为检测器，选择离子采集方式。

The Hypersil ODS column was used in HPLC, and mobile phase was composed of acetonitrile-0.25% aminic acid ammonium (25:75). The detection wavelength was at 305nm.

含量测定采用Hypersil ODS色谱柱；乙睛：0.25％甲酸铵（25：75）为流动相；检测波长，305nm；流速：1.0mL·min-1。

The reduction of energy of activation in the concerted path of the aminolysis of phenyl formate was found to be more significant than that in the neutral stepwise process due to the solvent effect of water, ethanol and acetonitrile.

水、乙醇和乙腈溶剂可降低协同途径的活化能，溶剂化效应的大小对溶剂的极性不敏感。

After centrifugation, the extracts were separated on HILIC column by using acetonitrile-water as mobile phase. The analytes were identified and quantitated by LC-tandem MS under the positive/negative electrospray ionization and multiple reaction monitormode. The calibration curves showed good linearity in the range of 25-5000 μg/kg for melamine and cyanuric acid, and 50-10000 μg/kg for ammeline and ammelide. The limits of detection and limits of quantification were in the range of 5-20 μg/kg and 50-100 μg/kg, respectively.

牛奶样品直接用乙腈超声波提取；奶粉样品先用水溶解后再加乙腈超声波提取，高速离心后以乙腈－水为流动相，采用亲水作用色谱柱分离这4种化合物，在电喷雾正、负电离切换多反应监测模式下进行定性与定量分析，三聚氰酸一酰胺与三聚氰酸二酰胺含量在50~10000μg/kg之间、三聚氰胺与三聚氰酸在25~5000μg/kg之间，均获得良好的线性。

The same year with the Institute of Fine Chemicalto develop fine chemical products - o-aminobenzoic acid, and 1.4 million yuan of funds into an annual output of 200 tons built anthranilic acid production line, by the province for the Prohibition of Chemical Weapons Convention to fulfill the work of leadership Office approval in April 2002 with an annual output of 200 tons of the scale of operation, product quality compared with similar products in the domestic leading level, in October 2002 to carry out technical transformation again, the scale of production from 200 tons; years expanded to 500 tons; in size, and product performance, production capacity of plant expansion requirements, in 2003 officially put into operation. The end of 2004 our company moved to Sequoia small city are on the 1st, covering over 20,000 square meters, anthranilic acid after the removal of the production line expanded to 1200 tons; in size, at the same time developed a 2,2 - Dithio Benzophenone acid, benzo-iso thiazoline -3 - one, dichloro-acetonitrile, thiophene tons of ketones, a series of inter-amino benzoic acid, etc. Fine Chemical Products.

同年公司与上海桑迪精细化工研究所合作开发精细化工产品—邻氨基苯甲酸，并投入140万元资金建成了年产200吨邻氨基苯甲酸生产线，经省履行禁止化学武器公约工作领导小组办公室批准于2002年4月以年产200吨的规模投入运行，产品质量与国内同类产品相比处于领先水平，2002年10月公司再次进行技改，把生产规模由原来的200吨；年扩到500吨；年规模，且产品性能、生产装置能力达到扩产的要求，2003年正式投入运行。2004年末我公司搬迁至杉城小均1号，占地2万多平方米，搬迁后邻氨基苯甲酸生产线扩大到1200吨；年规模，同时开发了2，2-二硫代二苯甲酸、苯并异噻唑啉-3-酮、二氯乙腈、噻吨酮、间氨基苯甲酸等一系列化工精细产品。

The plots of ln K′ of peptide 1 versus φ are well fitted with quadratic equations when isocratically eluted by aquo _ acetonitrile mobile phases.

当以乙腈为流动相测定肽1的lnK′随φ变化关系时，所得结果显示lnK′与φ呈现良好的二次曲线关系。

The Van't Hoff plots (plots of ln K′ versus 1/T) of the two peptides from microtubule _ associated protein 2 were also determined under isocratic elution conditions with aquo _ acetonitrile mobile phases.

以乙腈为流动相测定肽1和肽2的Van'tHoff曲线(lnK′与1/T的关系图)时，发现两种多肽的Van'tHoff曲线分别呈二次和三次方曲线。

Six products were formed in the reaction between N-benzylideneaniline andethyl benzoate; two products were separated from the reaction between N- benzylidene-(4-chloro) aniline and acetonitrile; and three products were afforded in the reaction between N-benzylideneaniline and benzalazine.

亚胺和苯甲酸乙酯的反应得到六个产物，和乙腈的反应得到两个产物，和苯亚甲基联氮的反应得到三个产物。

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。