氯甲烷

Samples were saponified with 20 g/L sodium hydroxide. The sexual hormones were then extracted with dichloromethane-acetic acetate (40∶1, v/v) under acidic conditions (pH 3, adjusted with 1 mol/L HCl ). An XTerraTMRP18 column was employed and a mixture of water-methanol-acetonitrile (50∶32∶18, v/v) was used as mobile phase. The seven sexual hormones were detected at 230 nm. The average spiked recoveries for the seven sexual hormones ranged from 75.6% to 97.8% with relative standard deviations of 1.9% to 7.2%. The linear ranges of determination were from 5 to 50 mg/L with correlation coefficients of 0.9999, and the limits of detection were from 3.7 to 12 ng.

先在试样中加入20 g/L氢氧化钠溶液与油脂进行皂化反应，然后用二氯甲烷-乙酸乙酯(体积比为40∶1)混合液在酸性条件下(pH 3)萃取，选择XTerraTMRP18色谱柱，以水-甲醇-乙腈(体积比为50∶32∶18)混合液为流动相，在波长230 nm处检测。7种性激素分离良好并排除了样品中杂质峰的干扰，低、高浓度平均回收率范围为75.6%~97.8%；相对标准偏差为1.9%~7.2%；检出限为3.7~12 ng。

Castor seeds were degreased with 3 kinds of solvents including petroleum ether, aether and methylene chloride, and ricins were extracted from the defatted castor cake with acetic acid solution. And the rat-killing activities of 3 kinds of ricins were compared in the rat-killing activity test.

方法］用石油醚、乙醚、二氯甲烷3种溶剂分别对蓖麻粗籽进行脱脂后，用醋酸水溶液从脱脂的蓖麻饼中提取蓖麻毒蛋白，通过杀鼠活性试验比较3种蓖麻粗毒蛋白的杀鼠活性。

Castor seeds were degreased with 3 kinds of solvents including petroleum ether,aether and methylene chloride,and ricins were extracted from the defatted castor cake with acetic acid solution.

方法用石油醚、乙醚、二氯甲烷3种溶剂分别对蓖麻粗籽进行脱脂后，用醋酸水溶液从脱脂的蓖麻饼中提取蓖麻毒蛋白，通过杀鼠活性试验比较3种蓖麻粗毒蛋白的杀鼠活性。

Methylene chloride ; catalytic combustion ; catalyst ; vanadium pentoxide ; chromium trioxide ;γ-alumina ; pottery ; waste gas treatment

二氯甲烷；催化燃烧；催化剂；五氧化二钒；三氧化铬；γ-氧化铝；陶瓷；废气处理

The calculated results validate the rationality of molecular structure design for TPA-based organic dyes.5.Effects on DSCs performance by dye bath solvents were investigated,and dichloromethane is chosen for sensitizers' comparison.6.The Incident Photon-to-Ccurrent Conversion Efficiencyand Current-Voltage curves of the DSCs based on the as-prepared dyes were measured.The relationship between dye structures and photovoltaic performance of the DSCs were studied.

计算结果证明了三苯胺基染料分子结构设计的合理性。5、研究了TiO_2膜的染料敏化时所用溶剂对电池性能产生的影响，结果表明，二氯甲烷溶液敏化的膜电极，用于DSCs的测试，均表现出较好的光电性能。6、通过入射单色光光电转换效率以及电流-电压曲线的测试，系统表征了三苯胺基染料敏化的DSCs的光电转换性能，揭示了影响电池性能参数差异的因素。

The success of development of the depainting agent has opened a new way for the profound processing ...

该脱落剂的开发成功为我国二氯甲烷的深度加工开辟了新的途径。

The major occupational hazards factors in printing ink were benzene, toluene, xylene, ethylbenzene, solvent gasoline, methanol, alcohol, isopropyl alcohol, ethyl acetate, butyl acetate, butyl acetate, dichloromethane, etc. 10 of 1224 samples (0.82%) exceeded the national occupational health standards.

印刷油墨中存在的职业病危害因素种类主要有苯、甲苯、二甲苯、乙苯、溶剂汽油、甲醇、乙醇、异丙醇、乙酸乙酯、乙酸丁酯、二氯甲烷等，检测样品总数1224件，超标样品数10件，超标率为0.82%。

This method is to obtain multi-fungi from water and waster water by methylene chloride fluid-fluid extract nitrogen,and then take the concentration purification to the highly effective liquid phase color spectrometer where it can be detected by the diode matrix detector.

用二氯甲烷液-液萃取氮吹浓缩法萃取水和废水中的多菌灵，取浓缩纯化后的有机相直接进样到高效液相色谱仪，用二极管矩阵检测器检测，根据保留时间外标法定量。

Breathing in fumes from cleaning fluids and paint removers that contain methylene chloride can also cause CO poisoning.

呼吸在油烟清洗液和油漆移除含有二氯甲烷也可以造成一氧化碳中毒。

Using free radical 4-hydroxy-2,2,6,6-tetramethyl-1-piperidinyloxyl as catalyst, the phase transfer catalyzed method of oxidation of anilines to 15 symmetrical azobenzenes with a saturated solution of potassium ferricyanide in 2N aqueous potassium hydroxide and dichloromethane was described for the first time.

用2，2，6，6-四甲基-4-羟基-1-哌啶氮氧自由基为催化剂，芳胺类化合物在饱和铁氰化钾的氢氧化钾溶液和二氯甲烷的两相转移催化下合成了15 个对称取代偶氮苯。

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。