乙腈
- 与 乙腈 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Methods Using Diamonsil ODS1 C18 Column, acetonitrile- 0.033mol/L Potassium Phosphate Monobasic acid(35:65) as the mobile phase,detection wavelength as 265nm and flow rate was 1.0ml/min.
HPLC用外标一点法,Diamonsil ODS1 C18柱,乙腈- 0.033mol/L磷酸二氢钾溶液(35:65)为流动相,流速为1.0ml/min,λ=265nm。
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Bis-imidazoline was prepared from triethylene tetraamine and N,N-dimethylformamide dimethyl acetal at 85℃ for 2 h with toluene as solvent, with a yield of 90.4%. The reaction of bis-imidazoline with 1,2-dibromoethane and potassium carbonate in acetonitrile provided with a monobromide salt yield of 78.7%. Hydrolysis of monobromide salt under aqueous causic solution formed 1,4,7,10-tetraazzcyclododecane in a 74.2% yield.
用甲苯作溶剂,使三乙烯四胺和N,N-二甲基甲酰胺二甲基缩醛在85℃反应2 h,得到中间体双咪唑啉,产率90.4%,在乙腈溶剂中,碳酸钾存在下,双咪唑啉和1,2-二溴乙烷进行扩环反应,得到环状中间体一溴盐,产率78.7%,一溴盐经碱性水解2 h,得到1,4,7,10-四氮杂十二烷,产率74.2%。
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The spectroscopic characteristics of C60 on Ag electrode s in nonaqueous solution were studied by surface-enhanced Raman scattering technique.
采用表面增强拉曼光谱技术研究了乙腈溶液中C60的悬液在银电极表面的光谱特征,得到了银电极表面C60团簇和表面吸附C60分子的光谱信息。
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This thesis is constituted by four parts: In the first part a summarization is given on the main total synthetic methods of isoflavones, for example, deoxybenzoin method which generally involves two steps wherein a phenol is reacted in the presence of a Lewis acid with phenylacetic acid to generate an intermediate deoxybenzoin which is then cyclized with a one carbon electrophile.
本论文主要工作包括四部分:第一章综述了近年来全合成异黄酮的主要方法:脱氧安息香法,是以多羟基苯酚与苯乙酸或苯乙腈在Lewis酸存在下,反应生成中间体脱氧安息香,然后再与亲电碳试剂进行关环反应生成异黄酮。
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Results The optimum condition was μ-Bondapak C18 column with acetonitrile-water-0.05% phosphonic acid gradient elution system, 1.0ml min^(-1) flow rate, 267 nm. detection wavelength and 23~26℃ temperature. The analysis ended within 45 min.
结果 在色谱柱为μ-Bondapak C183.9mm×300mm,10μm;流动相A相为乙腈,B相为0.05%的磷酸水溶液;流速为1.0ml/min;检测波长是267nm及温度为23~26℃的条件下;经45min梯度洗脱,成功的分离分析了桂枝汤中的4个成分。
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The nickel, lead, cadmium and mercury ions were pre-column derived by tera-(2-aminophenyl)-porphine (T2APP). These chelates were enriched by solid phase extraction with C18 cartridge and the enrichment factor of 50 was achieved.
中草药样品用微波消化,样品消化液中的镍、铅、镉、汞用四--卟啉(T2APP)柱前衍生,然后用ZORBAX RP18固相萃取小柱萃取富集镍、铅、镉、汞的T2-APP络合物,富集倍数为50倍;经富集后的络合物用乙腈和0.05mol?
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Methods:The RP-HPLC method was applied and protocatechuic aldehyde was used as the internal standard substance.
采用RP-HPLC法,以原儿茶醛为内参照物,色谱柱:Luna C_(18)柱(250mm×4.6mm,5μm),流动相:0.05%磷酸水溶液-乙腈,梯度洗脱程序为:0min时A-B(100∶0),80min时A-B(67∶33),85min时A-B(60∶40),100min时A-B(60∶40),流速:1.0mL·min~(-1),检测波长:280nm。
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The determination of quercitin was performed on Century SIL C18 BDS (250 mm×4.6 mm, 5μm) column, using methanol-water-phosphoric acid (V:V:V=60.00:40.00:0.02) as mobile phase at a flow rate of 0.8mLmin^(-1) and UV detection at 360 nm. The determination of gallic acid was performed on Century SIL C18 BDS (250 mm×4.6 mm, 5μm) column, using acetonitrile-water-phosphoric acid (V:V:V=5.00:95.00:0.02) as mobile phase at a flow rate of 0.8mLmin^(-1) and UV detection at 272 nm.
槲皮素的测定条件为:Century SIL C18, BDS(250.0mm×4.6mm, 5μm)色谱柱,流动相为甲醇-水-磷酸(体积比为60.00:40.00:0.02),流速为0.8mLmin^(-1),检测波长为360nm;没食子酸的测定条件为:Century SIL C18 BDS (250.0mm×4.6mm, 5μm)色谱柱,流动相为乙腈-水-磷酸(体积比为5.00:95.00:0.02),流速为0.80mLmin^(-1),检测波长为272nm。
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Two solvent systems which were MeOH -50% MeOH and 95% alcohol - water were studied by the content of salvianolic acid B and salviol ⅡA and the icon of Salvia miltiorrhiza Bge..
采用C18柱,乙腈-0.35%冰醋酸溶液梯度程序洗脱,以丹参酮ⅡA和丹酚酸B含量为指标并结合图谱,综合考察甲醇-50%甲醇、95%乙醇-水两套溶剂系统提取丹参药材的效果。
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Methods The determination was carried out over a Symmetry C18 column at 25℃. Methods tetrahydrofuran: 0.2% citric acid (14∶1∶85) was used as mobile phase at a velocity of 1 ml.min-1 and the detection wavelength was set at 360nm. ResultsRutin was found in SFE extract of Sparganium Stoloniferum.
方法在聚酰胺膜上点样,以80%乙醇作为展开剂鉴别芦丁,采用Symmetry C18色谱柱,以乙腈-四氢呋喃-0.2%枸橼酸(14∶1∶85)为流动相,柱温25℃,在流速为1.0 ml.min-1,360 nm的检测波长下,测定芦丁含量。
- 推荐网络例句
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My first article for Screen Power Magazine, which is to this day is the official magazine of Jackie Chan, was a DVD review of the Hong Kong actioner Gen-X Cops, starring Nicholas Tse and Daniel Wu.
我的第一篇文章为屏幕力量杂志,在对这天是Jackie Chan 正式杂志,是香港actioner Gen X 警察的DVD 回顾,担任主角Nicholas Tse 和丹尼尔吴。
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His lips grazed hirs, Now what are you going to do?
他的唇使吃草了 hirs,现在你将要做什麼?
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I wasn't a huge drinker, but I enjoy it socially.
我不是一个贪杯的人,但在社交场合我会略微享受一点。