氯甲烷

Character: Yellowish or yellow crystalline powder,smell-less; Assay: 98.0%—102.0%; Specific Optical Rotation:+63.0°to +69.0°; Ph:3.0 to 5.0;Clarity of Solution complies with the standard. Related Substance:(Single impurities≤0.5%; total impurities≤1.5%);Methanol:≤0.3%;Dichlormethane≤0.06%Acetone≤0.5%;walter:7.0%—9.5%; Residue on Ignintion:≤0.1%; Heavy Metals:≤0.0002% Identification:Most absorb at the wavelength 220nm,256nm,370nm; The infrared spectrogram according to the comparison; positive reflection

特征及特性：淡黄色或黄色结晶性粉末，无臭；含量98.0%—102.0%；鉴别：1）在220nm、256nm、370nm的波长处有最大吸收；2）供试品溶液在主峰的保留时间与对照品溶液主峰的保留时间一致；3）供试品红外光吸收图谱与对照品的图谱一致；4）呈正反映；比旋度：+63.0°至+69.0°；酸度：3.0—5.0；溶液颜色符合规定；有关物质：（单个杂质≤0.5%；总杂质≤1.5%）甲醇：≤0.3%；二氯甲烷：≤0.06%；丙酮：≤0.5%；水分：7.0%—9.5%；炽灼残渣：≤0.1%；重金属：≤0.0002

Objective: We detected the content of methylene chloride and diethylene oxide in Ceftizoxime Sodium using head-space GC method.

目的：建立一种气相色谱法测定原料药头孢唑肟钠中二氯甲烷和四氢呋喃有机溶剂残留量的方法。

It is obvious from the relativerate constants that the electronic property of the substituent markedly affects the insertionreaction.

对〓，选用苯和二氯甲烷，研究了溶剂效应的影响。

As the dichloro methane are mainly used for isododecane, flushing agent and the original material of triacetate fiber rubber sheet.

由于二氯甲烷具有不可燃性和极强渗透性以及易挥发性等优良性能，被誉为多功能超强溶剂的代表。

The different hexanedichloromethane volumn ratio effection on molecular weight of,molecular weight distribution and weight percent of lowmolecule of polyisobutene by boron trifluoride initiator was studied in this paper by IR and UV.

研究了正己烷—二氯甲烷溶剂配比对BF3引发体系的聚异丁烯分子量及分子量分布、低分子物含量的影响，给出了BF3引发体系聚异丁烯及AlCl3引发体系聚异丁烯的红外光谱及紫外光谱。

The crosslinked PEG-20M glass capillary column was prepared by dynamic coating method with boron trifluoride as catalyst,3-glvcidyl-oxypropyl-trimethoxysilane as crosslinking agent.

以PEG－20M为固定相，三氟化硼为催化剂，3－缩甘油氧丙基三甲氧基硅烷（简称KH－560）为交联剂，二氯甲烷为溶剂，对预先用氯化钠沉积法粗糙化的玻璃毛细管柱进行动态涂渍。

The attracting activity of the extracts of withered black poplar leaves: Volatiles from withered leaves of black poplar, extracted by steam distillation and dichloromethane, strongly attract adults of Agrotis, ypsilon, Spodoptera exigua and Herculia glaucinalis in the field bioassay, but are less attractive to CBW.

黑杨萎蔫叶片粗提物的诱虫活性采用水蒸汽蒸馏和二氯甲烷萃取，提取黑杨萎蔫叶片的挥发性物质。

The extraction of organic constituents in four kinds of refinery waste water with CH2Cl2 was conducted in alkalic and acidic conditions, respectively.

对四种炼油污水分别在碱性和酸性条件下用二氯甲烷萃取；采用色谱质谱联机全面分析了萃取物中有机物组

Meanwhile, Azoxybenzene was also detected by GC-Mass from the extracts of culture fluids with dichloromethane, which conformed the probability of the existence of two metabolites: nitrosobenzene and N-phenylhydroxylamine. Because Azoxybenzene might be yield from the reaction of these two compounds under the catalytic influence of alkali.

另外通过GC-MS测定硝基苯降解液的二氯甲烷提取物，测到氧化偶氮苯的存在，它能在碱的催化作用下由亚硝基苯和N-苯基羟胺反应生成，所以它的存在从反面证实了降解中间产物亚硝基苯和N-苯基羟胺的存在。

Chemical investigation on the leaves of cultivated Calophyllum inophyllum linn led to the isolation of three compounds named Friedelan-3-one(1),1-triacontanol(2) and canophyllol.

从人工栽培红厚壳叶的二氯甲烷提取物中分离得到3个化合物，经理化数据对照和波谱分析，确定它们分别为：木栓酮(1)，三十烷醇(2)和海棠果醇(3)。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。