乙腈

The decay of SO·4- decelerates with increasing volume fraction of ACN in mixed media whereas the decay of TyrO· accelerates.

随介质中乙腈体积分数的增加，SO·4-的衰变速率减慢而酪氨酸中性自由基的衰变速率加快。

Samples were prepared by protein precipitation with acetonitrile and defatting with n-hexane. The analytes were detected with API 4000 triple quadrupole tandem mass spectrometer equipped with ESI source in the positive ion mode.

猪肉样品中加入乙腈沉淀蛋白，经正己烷脱脂后，采用液相色谱-三重四极杆串联质谱检测，使用电喷雾离子化源，在正离子条件下以多反应监测方式进行扫描。

The sample was extracted by acetonitrile plus water, degreased by n-hexane, and purified by adsorption.

样品用乙腈水提取，正己烷除脂，提取液经液液萃取和反萃取，电子捕获检测器检测，外标法定量。

Another system employs acetonitrile electrolyte with an activated carbon doublelayer storage electrode coupled with a graphitic carbon that intercalates Li ions.

另外一个体系采用乙腈电解质和活性炭双电层储能电极但是采用石墨电极来作为嵌锂电极。

Methods The column: Agilent Zorbax SBC18 (4.6mm×250mm,5μm); the mobile phase∶0.1mol/L trifluoroacetic acidmethanol (80∶20); the drift tube temperature: 45℃; the pressure of nebulizing gas: 3.5bar.

采用Agilent Zorbax SBC18(4.6mm×250mm，5μm)色谱柱，流动相为0.1%三氟乙酸溶液∶乙腈(80∶20)，流速为0.8ml/min，漂移管温度为45℃，雾化气体压力为3.5bar。

For the determination of five carbamate pesticide residues by high performance liquid chromatography with gel permeation chromatography purification, sample was extracted with acetonitrile and purified with gel permeation chromatography. Methanol-water was used as the mobile phase by gradient elution, flow rate of 1.0mL/min, using a fluorescence detector and quantitating with external standard method.

凝胶渗透色谱-液相色谱法测定5种氨基甲酸酯类农药残留中，实验采用乙腈提取，凝胶渗透色谱柱对样品进行净化，以甲醇-水为流动相，进行梯度洗脱，流速1.0mL／min，荧光检测器检测，外标定量测定。

The organic layer was evaporated and the residue was redissolved by mobile phase.The concentrations of propofol and lidocaine were assayed on a hypersil BDS C18 column with a mobile phase consisting of acetonitrile-methanol-water（10∶60∶30）（including 0.14%n-butyamine 0.1%acetic acid）at a flow rate of 1 mL*min-1 and detected at 220 nm during 1～7 min and at 273 nm during 7～16 min.

氮气吹干有机层，残留物用流动相重新溶解后，用Hypersil BDS C18柱分析，流动相为乙腈-甲醇-水(10∶60∶30)，内含正丁胺0.14%和冰醋酸0.1%，流速为1 mL*min-1，检测波长：1～7 min用220 nm，7～16 min用273 nm。

The (A~2Π_i)-(X~2Σ~+)(2, 0) band of CN was reinvestigated in the AC glow discharge of CH_3CN with He as the carrier gas using near-infrared concentration modulation laser spectroscopy.

利用近红外差分浓度调制激光光谱技术，我们在氦气和乙腈的交流辉光放电中观测到了CN自由基(A~2Π_i)-(X~2Σ~+)(2，0)带的吸收谱，测量和标识了189条谱线，包括全部12个转动支带。

The results show that the thinner the Ag film is, the sparser the Ag microstructures is obtained. The changes of morphologies for different reaction time indicate that the reaction undergoes three stages, i.

结果表明，Ag膜越薄，生长出的晶体越稀疏；Ag膜与TCNQ乙腈溶液的反应时间影响其形貌的变化。

The determination of amino acids in blood clam antianaemia oral liquid using HPLC-AccQ-Tag method is reported. The oral liquid reacted with 6-aminoquinolyl-N-hydroxysuccini-mdyl carbamate. Then, the corresponding derivatives were analyzed with an HPLC. The chromatographic conditions were AccQ-TagTM C18 column for amino acids analysis (3.9mm×15cm); mobile phase of program elution sodium acetate solution(pH5.02), acetonitrile, Milli-Q water. The amino acids'AQC deriatives were detected at 248nm with a UV-detector. Eighteen kinds of amino acids were completely determined in 35 minutes.

以6-氨基喹啉-N-羟基琥珀酰亚胺基氨基甲酸酯为衍生剂，与毛蚶抗贫血口服液中的氨基酸柱前定量衍生，用WatersHPLC仪，AccQ-TagTM专用C18柱(3.9mm×15cm)，以140mmol·L-1的醋酸钠溶液(pH5.02)为溶剂A，乙腈为溶剂B，超纯水为溶剂C，进行梯度洗脱，检测波长为248nm，35min测试完毕。

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。