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  Home > JCE Print > Journal of Chemical Education > Issues > 2004  > January  >
In the Laboratory
Cost-Effective Teacher
Using a Disposable Pipet for Preparing Air-Sensitive Compounds for Melting Point Determinations or Storage
Martial Sanz
Departamento de Química Inorgánica, Universidad de Alcalá, Edificio de Farmacia, Campus Universitario, Madrid, Spain
Cover
January 2004
Vol. 81 No. 1
p. 106
Abstract
An inexpensive disposable Pasteur pipet can be transformed into a capillary tube, which, once correctly coupled with a Quickfit adapter with a side arm by means of a rubber septum, can receive under a dried and inert atmosphere air-sensitive samples from a Schlenk-type vessel. When the air-sensitive substance is placed at the bottom of the capillary tube, it is sealed under vacuum at the appropriate length. The capillary tube is then ready to be employed for melting point determination. This method can be also extended to the storage of air-sensitive compounds and proves to exceed those already described in the literature by its simplicity of construction and use, inexpensive cost, convenience, and reliability, requiring no grease to obtain a good vacuum.
More Information
*  Citation
 Sanz, Martial. J. Chem. Educ. 2004 81 106.
*  Keywords
 Analytical Chemistry; Laboratory Equipment / Apparatus; Physical Properties
*  History
 Created:
Last Updated:		 December 8, 2003
February 18, 2005
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