新建电泳涂装线投产前的准备工作

介绍了新建阴极电泳涂装线在投产前必须要做的一些准备工作。     

毛细管色谱法同时测定异戊二烯中环戊二烯、甲基吡咯烷酮和二甲基甲酰胺

用毛细色谱法建立异戊二烯中各组分定性分析方法及环戊二烯,N-甲基吡咯烷酮,N,N-二甲基甲酰胺的测定方法。气相色谱条件:采用OV-1701毛细管气相色谱柱,50 m×0.32 mm×0.53μm。程序升温60℃保持5 min后,以10℃/min升至190℃,保持3 min。氮气(纯度99.999%)为载气,柱前压为69 kPa。分流进样,分流比1∶100。进样口温度200℃,FID检测器,检测器温度为200℃。结果表明,异戊二烯中各组分均达到良好分离。环戊二烯、N-甲基吡咯烷酮、N,N-二甲基甲酰胺的线性范围均为0.5~1 200μg/mL;回收率分别为96.0%~98.5%,95.0%~102%,96.0%~99.6%;检出限均达到0.5μg/mL。其方法简单、快捷且灵敏度高,可以用于异戊二烯中杂质含量的控制。     

STUDIES ON COUNTERACTING CHROMATOGRAPHIC ELECTROPHORESIS AND ITS UTILIZATION FOR PROTEIN PURIFICATION

A counteracting chromatographic electrophoresis(CACE)separation device has been success-fully built and tested.Experiments are performed with protein mixtures of BSA,Hg,Mg and Cyto-cto study the separation performances,concentration profiles,start-up methodology as well as influ-ences of pH and ionic strength on the separation process.Mathematical models based on the fluiddynamics of the porous medium are proposed.Experiments indicate that the CACE process has agood commercial potential in protein engineering and fine chemicals purification.     

毛细管气相色谱法分析双丙酮丙烯酰胺的含量

用毛细管气相色谱，FID检测器，内标法定量，分离测定了双丙酮丙烯酰胺及其主要杂质丙烯酰胺的含量，其相对标准偏差分别为0．19和0．014；变异系数分别为0．19％和4．71％。     

新型离子液体气相色谱固定相研究

合成了一种用作新型气相色谱固定相的室温离子液体[C7H17NO] [(CF3SO2)2N]-,并考察其色谱性能。该固定相具有较好的成膜性、较高的柱效、较强的极性,对正构烷烃、芳香族化合物以及一些位置异构体具有良好的分离效果。     

电泳四氟乙烯耐磨涂层

论述了电泳四氟乙烯的泳前处理、工艺规范、质量控制、验收技术标准。     

液固分离技术的进展

本文简述了液固分离技术近年来的进展。特别涉及加压电过滤设备、毛细吸附作用下的真空过滤机、动态过滤技术、新型卧式螺旋卸料沉降离心机、滤材等方面技术的国内外进展情况。     

Preparation of phenolic resin derived 3-D ordered macroporous carbon

Three-dimensionally ordered long-range macroporous carbon structures were prepared using commercially available phenolic resin by utilizing sacrificial colloidal silica crystalline arrays as templates that were subsequently removed by HF etching after pyrolysis in an argon atmosphere. SEM, TEM, and BET were employed to characterize the morphology and the surface area of the porous carbon structures. The pore size (150–1000 nm) and BET surface area, which reflect pore volume (298.6 m²/g (1.32 cm³/g) ∼ 93.7 m²/g (0.12 cm³/g)), of the macroporous carbon structures produced were approximately proportional to the size (150–1000 nm) of the sacrificial silica sphere templates used (annealing temp. 550°C). The achieved 550 nm porous carbon structures were examined to function as potential catalyst carriers and were successfully impregnated with Ag or Pt-Ru on their inner walls after borohydride reduction at room temperature. In addition, porous carbon patterns were fabricated using the ‘micromolding in capillary’ technique, which has potential applications in the microreaction technology.     

毛细管电泳法测定银杏叶片中的橙皮素、芦丁和槲皮素

建立了一种利用毛细管电泳测定银杏叶片中橙皮素、芦丁和槲皮素的方法。研究了缓冲溶液pH值和浓度、分离电压和进样时间对分离的影响，在优化的条件下，10min内实现了三种物质的良好分离。橙皮素、芦丁和槲皮素分别在0．03～0．80、0．06～0．00，0．04～0．90mg/mL浓度范围内和峰电流成线性关系，线性相关系数分别为0．9992、0．9976、0．9991，检出限分别为0．005、0．009和0．006mg/mL。     

毛细管气相色谱法同时测定三磷酸胞苷二钠中5种有机溶剂残留量

研究建立了同时测定三磷酸胞苷二钠中乙醇、丙酮、氯甲醚、甲苯、苯乙烯5种有机溶剂残留量的毛细管气相色谱法。样品以乙腈为溶剂,经DB-FFAP(30 m×0.32 mm×0.25μm)毛细管柱分离,氢火焰离子化检测器检测,这5种有机溶剂呈良好的线性响应,平均回收率在98.3%~99.5%,精密度RSD在0.21%~1.92%,最低检出限可达5.0~7.5 mg/kg。本方法简单、灵敏、准确,完全能满足药品中所述有机溶剂残留量的测定要求。