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iSchlenk: Portable Equipment for Hands-On Instruction in Air-/Moisture-Sensitive Syringe, Cannula, and Schlenk Techniques
Journal of Chemical Education ( IF 3 ) Pub Date : 2018-05-17 00:00:00 , DOI: 10.1021/acs.jchemed.8b00141
Louis Messerle 1
Affiliation  

iSchlenk, a portable instructional cart with equipment for hands-on student experience in safe handling of air-sensitive, moisture-sensitive, toxic, pyrophoric, and/or radioactive chemical materials, is described. The cart, for use by ≤4 students, has compressed air and vacuum from a diaphragm vacuum pump supplied to 4 three-port Schlenk lines with double-oblique glass stopcocks. Air pressure is adjusted by a pressure-release mineral oil bubbler. The cart’s drawers contain glassware and equipment (polypropylene and glass syringes, deflected-point needles, cannula, rubber septa, Schlenk flasks, Schlenk fritted funnels, pour tubes, gas-inlet adapters) for instruction in liquid transfer (syringe, cannula, pour tube) and basic Schlenk techniques. Water serves as the simulant for pyrophoric liquids, compressed air for inert gases, and fine sand for insolubles. The results of anonymous (coded by student) written assessments, before and after student use of iSchlenk, are presented. iSchlenk design criteria and construction, classroom/laboratory implementations in an undergraduate advanced inorganic chemistry laboratory course and in a graduate lecture course in organometallic chemistry, and an assessment instrument for undergraduate and graduate student mastery of safe Schlenk, cannula, and syringe techniques is discussed.

中文翻译:

iSchlenk:空气/湿度敏感注射器,套管和Schlenk技术中的动手操作便携式设备

介绍了iSchlenk,这是一种便携式指导推车,带有可动手操作的学生经验的设备,可安全处理对空气敏感,对湿度敏感,有毒,自燃和/或放射性化学物质。可供≤4名学生使用的手推车具有隔膜真空泵的压缩空气和真空,该隔膜真空泵提供给4条带双斜玻璃旋塞阀的三通舒伦克管线。空气压力通过释放矿物油的鼓泡器进行调节。手推车的抽屉中装有玻璃器皿和设备(聚丙烯和玻璃注射器,弯针,针头,橡胶隔垫,Schlenk烧瓶,Schlenk烧结漏斗,倾倒管,进气口适配器),用于液体转移(注射器,套管,倾倒管)的说明。 )和基本的Schlenk技术。水是发火液体的模拟物,惰性气体是压缩空气,和不溶物的细砂。展示了在学生使用iSchlenk之前和之后的匿名(由学生编码)书面评估结果。讨论了iSchlenk的设计标准和结构,在有机无机化学本科课程和研究生讲座课程中的课堂/实验室实施情况,以及评估本科生和研究生对安全Schlenk,套管和注射器技术的掌握程度的评估工具。
更新日期:2018-05-17
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