乙腈

A new process was proposed to get musk ketone and musk xylene from the eutectics by adding acetonitrile and heptane, which was verified by experiments.

提出采用乙腈和庚烷从低共熔组成的酮麝香、二甲苯麝香混合物中得到两种产品的过程，实验结果表明该过程是可行的。

Methods: The chromatographic separation was performed on a Hypersil ODS2 column(250 mm×4.6 mm, 5 μm) with mobile phases of potassium dihydrogen phosphate hexyl amine solution-acetonitrile(74∶26) for the determination of its related substances and methanol-0.05 mol/L potassium dihydrogen phosphate solution(1∶1) for the determination of dexbetamethasone sodium phosphate. The flow rate was 0.8 ml/min, the detection wavelength was 254 nm, the column temperature was 25℃ and the sample size was 20 μl.

色谱柱为Hypersil ODS2柱(250 mm×4.6 mm，5 μm)；有关物质测定的流动相为磷酸二氢钾己胺溶液-乙腈(74∶26)，含量测定的流动相为甲醇-0.05 mol/L磷酸二氢钾溶液(1∶1)；流速为0.8 ml/min，检测波长为254 nm，柱温为25℃，进样量为20 μl。

Hot gases from the neutralizer next are water washed at ambient temperature to absorb acrylonitrile ,acetonitrile hydrogen cyanide and other by products .

热气体从中和剂明年是水清洗常温吸收丙烯腈，乙腈氰化氢和其他的产品。

All these dyes allowed detection for anions such as F~- and AcO~- in CH_3CN, which is likely to be related to the enhancement of intramolecular charge transfer induced by instance deprotonation of compounds.

在加入碱性较大的阴离子后，化合物1-4的乙腈溶液的紫外可见吸收光谱均发生了明显的红移，表明1-4是一类较好的阴离子化学传感器。

A new inequilateral organic polyamine, 2-aminoethyl-bi(3-aminopropyl)amine, was synthesized by the additional and hydrogenation reaction of aminoacetonitrile with acrylonitrile.

利用氨基乙腈及丙烯腈的亲核加成、氢化反应合成了一种新的不等臂有机多胺化合物2-氨基乙基-二（3-氨基丙基）胺。

An ion-pair chromatographic method for the determination of Cr has been developed using a silica-based monolithic column and a conductivity detector.

研究了基于硅胶整体柱的离子对色谱快速测定Cr的方法，讨论了淋洗液浓度、乙腈浓度、流速、温度和pH等因素对分离的影响。

Aflatoxins were enhanced by mercury chloride solvent online and detected by fluorescence detector.

采用免疫亲和方法进行样品前处理，用甲醇－乙腈－水三元流动相体系分离黄曲霉毒素，氯化汞溶液在线衍生，荧光检测器检测，建立了新型的高效液相色谱柱后衍生测定黄曲霉毒素(B1、B2、G1、G2、M1)的方法。

The experimental conditions included reverse phase C-18 column, equivalent elution by 17 % methyl cyanide and detection wavelength at 259 nm.

试验条件为反相C18柱、17 %乙腈等度洗脱，以259 nm为检测波长。

The chromatographic column is Nucleosil the C18 column (4.6mm×250mm,5μm); Flowing for methyl cyanide - water =1∶2; The speed of flow is 0.8ml/min; The examination wave length is 205 nm; The speed is 0.4mm/min.

色谱柱为Nucleosil C18柱(4.6mm×250mm，5μm)；流动相为乙腈-水＝1∶2；流速为0.8ml/min；检测波长为205 nm；速度为0.4mm/min。

01 Mol/L solution of sodium heptanesulfonate (to adjust PH to 2.2 with the debited orthophosphoric acid)-methyl cyanide (44:56) as mobile phase, detective wavelength was 254 nm.

采用HPLC法以辛基硅烷键合硅胶为填充剂；以0.01 mol/L庚烷磺酸钠溶液（稀磷酸调PH值至2.2）-乙腈(44：56)为流动相；检测波长为254 nm。

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。