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・ Labour Conventions Reference
・ Labour corps
・ Laboratory for Bioregenerative Medicine and Surgery
・ Laboratory for Computational Cultural Dynamics
・ Laboratory for Computer Science (University of Paris-Sud)
・ Laboratory for Electro-Optics Systems
・ Laboratory for Electromagnetic and Electronic Systems
・ Laboratory for Energy Conversion
・ Laboratory for Experimental Medicine and Surgery in Primates
・ Laboratory for Foundations of Computer Science
・ Laboratory for Interactive Learning Technologies
・ Laboratory for Laser Energetics
・ Laboratory for the Analysis of Organisational Communication Systems
・ Laboratory for Visionary Architecture
・ Laboratory frame of reference
Laboratory funnel
・ Laboratory glassware
・ Laboratory Historic District
・ Laboratory informatics
・ Laboratory information management system
・ Laboratory Investigation (journal)
・ Laboratory Life
・ Laboratory mouse
・ Laboratory News
・ Laboratory of Analysis-Research in quantitative Economics
・ Laboratory of biomechanics
・ Laboratory of Comparative Human Cognition (LCHC)
・ Laboratory of design, manufacturing and control
・ Laboratory of Instrumentation and Experimental Particles Physics
・ Laboratory of Microstructure Studies and Mechanics of Materials


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Laboratory funnel : ウィキペディア英語版
Laboratory funnel

Laboratory funnels are funnels that have been made for use in the chemical laboratory. There are many different kinds of funnels that have been adapted for these specialized applications. Filter funnels, thistle funnels (shaped like thistle flowers), and dropping funnels have stopcocks which allow the fluids to be added to a flask slowly. For solids, a powder funnel with a wide and short stem is more appropriate as it does not clog easily.
When used with filter paper, filter funnels, Buchner and Hirsch funnels can be used to remove fine particles from a liquid in a process called filtration. For more demanding applications, the filter paper in the latter two may be replaced with a sintered glass frit.
Separatory funnels are used in liquid-liquid extractions.
== Construction ==

Glass is the material of choice for laboratory applications due to its inertness compared with metals or plastics. However, plastic funnels made of nonreactive polyethylene are used for transferring aqueous solutions. Plastic is most often used for powder funnels which do not come into contact with solvent in normal use.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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