An Erlenmeyer flask , also known as a conical flask ( British English ) or a titration flask , is a type of laboratory flask with a flat bottom, a conical body, and a cylindrical neck. It is named after the German chemist Emil Erlenmeyer (1825–1909), who invented it in 1860.
17-466: [REDACTED] Look up flask in Wiktionary, the free dictionary. Flask may refer to: Container [ edit ] Hip flask , a small container used to carry a small amount of liquid Laboratory flask , laboratory glassware for holding larger volumes than simple test tubes Erlenmeyer flask , a common laboratory flask with a flat bottom,
34-505: A pencil . It differs from the beaker in its tapered body and narrow neck. Depending on the application, they may be constructed from glass or plastic, in a wide range of volumes. The mouth of the Erlenmeyer flask may have a beaded lip that can be stoppered 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
51-420: 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. Erlenmeyer flasks are also used in microbiology for
68-477: A common laboratory flask with a flat bottom, a conical body, and a cylindrical neck Vacuum flask , a container designed to keep warm drinks warm and refrigerated drinks cold Other [ edit ] Flask (metal casting) , a containing frame without a top or bottom, with sides only, used to hold molding sand Flask (web framework) , a web framework for the Python programming language Powder flask ,
85-422: A conical body, and a cylindrical neck Vacuum flask , a container designed to keep warm drinks warm and refrigerated drinks cold Other [ edit ] Flask (metal casting) , a containing frame without a top or bottom, with sides only, used to hold molding sand Flask (web framework) , a web framework for the Python programming language Powder flask , a small container for gunpowder FLASK ,
102-410: A high number of baffles. To impede illicit drug manufacturers, the state of Texas previously restricted the sale of Erlenmeyer flasks to those who have the requisite permits. On September 1, 2019, SB 616 amended the law so that permits are no longer required, but accurate inventory of this and certain other pieces of lab equipment must still be maintained, loss or theft must still be reported, and
119-553: A small container for gunpowder FLASK , the Flux Advanced Security Kernel, an operating system security architecture Flask (unit) , a unit used in UK avoirdupois weight to measure the element mercury The Flask, Hampstead , a Grade II listed public house at 14 Flask Walk, Hampstead, London The Flask, Highgate , a Grade II listed public house at 74–76 Highgate West Hill, Highgate, London Flask Walk ,
136-540: A street in Hampstead, London See also [ edit ] All pages with titles beginning with Flask All pages with titles containing Flask Lagena (disambiguation) , a word derived from the Greek meaning flask Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title Flask . If an internal link led you here, you may wish to change
153-475: A word derived from the Greek meaning flask Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title Flask . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Flask&oldid=1168901230 " Category : Disambiguation pages Hidden categories: Short description
170-422: Is a common design modification for filtration under vacuum. 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. Such features similarly make the flask suitable for boiling liquids. Hot vapour condenses on
187-477: Is different from Wikidata All article disambiguation pages All disambiguation pages flask [REDACTED] Look up flask in Wiktionary, the free dictionary. Flask may refer to: Container [ edit ] Hip flask , a small container used to carry a small amount of liquid Laboratory flask , laboratory glassware for holding larger volumes than simple test tubes Erlenmeyer flask ,
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#1732776330131204-569: The Flux Advanced Security Kernel, an operating system security architecture Flask (unit) , a unit used in UK avoirdupois weight to measure the element mercury The Flask, Hampstead , a Grade II listed public house at 14 Flask Walk, Hampstead, London The Flask, Highgate , a Grade II listed public house at 74–76 Highgate West Hill, Highgate, London Flask Walk , a street in Hampstead, London See also [ edit ] All pages with titles beginning with Flask All pages with titles containing Flask Lagena (disambiguation) ,
221-427: 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. The shaking frequency has the most significant impact on oxygen transfer. Oxygenation and mixing of liquid cultures further depend on rotation of the liquid "in-phase", meaning the synchronous movement of the liquid with the shaker table. Under certain conditions
238-523: The link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Flask&oldid=1168901230 " Category : Disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages Erlenmeyer flask Erlenmeyer flasks have wide bases and narrow necks. They may be graduated, and often spots of ground glass or enamel are used where they can be labeled with
255-399: 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
272-427: The shaking process leads to a breakdown of liquid motion – called "out-of-phase phenomenon". This phenomenon has been intensively characterized for shake flask bioreactors. Out-of-phase conditions are associated with a strong decrease in mixing performance, oxygen transfer, and power input. Main factor for out-of-phase operation is the viscosity of the culture medium, but also the vessel diameter, low filling levels and/or
289-424: The upper section of the Erlenmeyer flask, reducing solvent loss. Erlenmeyer flasks' narrow necks can also support filter funnels . 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
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