1)  trace benzene
微量苯
1.
The reaction process in which trace benzene (<10 mg/L) can be removed from water by UV is in conformity with the first order kinetic equation and characterized by its relative rapid velocity of trace benzene degradation in water.
紫外线 (UV)能去除水中微量苯 (<10mg/L) ,其反应过程可用一级动力学方程描述 ,但其降解速度较快 ,这是该技术降解水中微量苯的一个特点。
2)  trace phenol
微量苯酚
3)  minim
微量
1.
The progress in determining the minim Gallium which includes absorptiometric analysis is introduced, and various analytical approaches are discussed such as spectrophotofluorimeter, atomic absorption spectrophotometry and polarographic method etc.
由于镓是稀散金属 ,且分布分散 ,因此对于微量镓的分析测定就极为重要 。
4)  trace
微量
1.
Study on Simultaneous Determination of Trace Fe~(2+) and Fe~(3+) in Rock Salt by Spectrophotometry;
分光光度法同时测定岩盐中微量Fe~(2+)和Fe~(3+)的研究
2.
Detecting the Content of Trace Methanol,Ethanol,Acetone,Methoxycarbonyl Acetate,Vinyl Acetate from Industrial Cooling Wastewater with Gas Phase Chromatography Method;
用气相色谱法测定工业冷却废水中微量甲醇、乙醇、丙酮、醋酸甲酯、醋酸乙烯的含量
3.
The determination of trace calcium in highly purity RE samples by the atomic absorption spectrophotometry combined with standard addition method;
标准加入原子吸收分光光度法测定高纯稀土产品中的微量钙
5)  microscale
微量
1.
Green Chemistry Should Be Made from the Chemical Experiment——On Preparatory Instrument of Semi-microscale Organic Experiment;
绿色化学应当从化学实验开始——谈半微量有机制备仪的设计思想
2.
Smallscale semimicro microscale organic experiments have been practised step by step.
本文介绍了小量—半微量—微量有机化学实验的教学内容和特点 ,及在教学中初步试用的效
6)  microamount
微量
1.
Determination of glutamate in microamount cerebrospinal fluid after acute brain injury in mice;
小鼠急性脑损伤后微量脑脊液谷氨酸浓度的测定
2.
This paper introuduced to use volumetric analysis to determine the microamount calcium and magnesium in sodium sulfate by diminishing the affect of iron(Ⅲ), and validated the reliability of this method.
提出采用沉淀分离法消除Fe3 + 等离子的干扰 ,用容量法来测定Na2 SO4中微量的钙、镁含量 ,并验证了该方法的可靠
参考词条
补充资料:α-苯甲酰基-4-苯甲酰氧基-2-羟基苯乙酮
分子式:C22H16O5
分子量:360.36
CAS号:5465-06-5

性质:结晶化合物。熔点为162-165℃。

制备方法:可用间苯二酚与乙酸在氯化锌参与下反应(乙酰化),生成2,4-二羟基苯乙酮,然后与苯甲酰氯反应得2,4-二(苯甲酰氧基)苯乙酮,进而在丙酮中于氢氧化钾作用下分子重排(苯甲酰基转位)制得该品。

用途:心脉舒通(乙酯黄酮)的中间体。

说明:补充资料仅用于学习参考,请勿用于其它任何用途。