Erlenmeyer flask

Erlenmeyer flask

Erlenmeyer flask

The Erlenmeyer flask was invented by the German chemist, Leopold Freund during the 19th century. It is primarily designed for laboratory use, primarily for distilling mixtures of liquids. The flask also forms the main body of the chemical instrument used in air quality measurements.


For the episode of The X-Files, see The Erlenmeyer Flask. (Source: en.wikipedia.org

The mouth of the Erlenmeyer flask may have a beaded lip that can be stopped or covered. Alternatively, the neck may be fitted with ground glass or other connector for use with more specialized stoppers or attachment to other apparatus. A Büchner flask is a common design modification for filtration under vacuum. (Source: en.wikipedia.org)

The slanted sides and narrow neck of this flask allow the contents of the flask to be mixed by swirling, without risk of spillage, making them suitable for titrations by placing it under the buret and adding solvent and the indicator in the Erlenmeyer flask.

The final two attributes of Erlenmeyer flasks make them especially appropriate for recrystallization. The sample to be purified is heated to a boil, and sufficient solvent is added for complete dissolution. The receiving flask is filled with a small amount of solvent, and heated to a boil. The hot solution is filtered through a fluted filter paper into the receiving flask. Hot vapors from the boiling solvent keep the filter funnel warm, avoiding the premature crystallization.

Like beakers, Erlenmeyer flasks are not normally suitable for accurate volumetric measurements. Their stamped volumes are approximate within about 5% accuracy. (Source: en.wikipedia.org

Erlenmeyer flasks are also used in microbiology for the preparation of microbial cultures. Erlenmeyer flasks used in cell culture are sterilized and may feature vented closures to enhance gas exchange during incubation and shaking. The use of minimal liquid volumes, typically no more than one fifth of the total flask volume, and baffles molded into the flask's internal surface both serve to maximize gas transfer and promote chaotic mixing when the flasks are orbitally shaken. The oxygen transfer rate in Erlenmeyer flasks depends on the agitation speed, the liquid volume, and the shake-flask design. (Source: en.wikipedia.org)Microcystis floating colonies in an Erlenmeyer flask. (Source:en.wikipedia.org))

^ Emil Erlenmeyer, "Zur chemischen und pharmazeutischen Technik," Zeitschrift für Chemie und Pharmacie, vol. 3 (January 1860), 21-22. He wrote that he first displayed the new flask at a pharmaceutical conference in Heidelberg in 1857, and that he had arranged for its commercial production and sale by local glassware manufacturers. (Source: en.wikipedia.org)To impede illicit drug manufacturers, the state of Texas previously restricted the sale of Erlenmeyer flasks to those who have the requisite permits. (Source: en.wikipedia.org)

This object is a stoppered 125 mL Erlenmeyer flask made of Pyrex glass. The Erlenmeyer flask is named for Emil Erlenmeyer (1825–1909), a German organic chemist who designed the flask in 1861. The flask is often used for stirring or heating solutions and is purposefully designed to be useful for those tasks. The narrow top allows it to be stoppered, the sloping sides prevent liquids from slopping out when stirred, and the flat bottom can be placed on a heating mechanism or apparatus.

Sella, Andrea. “Classic Kit: Erlenmeyer Flask,” July 2008. http://www.rsc.org/chemistryworld/Issues/2008/July/ErlenmeyerFlask.asp.

Use these flasks for a variety of applications. PYREX™ Wide-Neck Heavy-Duty Erlenmeyer Flasks are designed for longer life and feature high resistance to chemical attack, rugged tooled top finish and wide mouth. (Source: www.fishersci.ca www.fishersci.ca))Constructed of PYREX™ for durability. Erlenmeyer style, rugged tooled top finish and wide mouth.

Erlenmeyer flasks made from high quality borosilicate glass. Includes an acid resistant polypropylene screw cap that is lined with PTFE. Both flask and cap are autoclavable.

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