2018년 2월 19일 월요일

Erlenmeyer flask

Erlenmeyer flask

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Erlenmeyer flask

Type of Erlenmeyer flask

Original drawing of Erlenmeyer flask

Erlenmeyer flask used for

Erlenmeyer flask(Sankekan flask) orErlenmeyer flask Is a type of laboratory featuring a flat bottom, conical fuselage, cylindrical neck. The name comes from the German chemist who invented this flask in 1860.

table of contents

design

Erlenmeyer flasks are large in base, gradually becoming thinner toward the top, with short vertical necks first. There are also graduated ones, there are often places where you can mark with or. The point where the torso becomes thin and the thin neck are different.

The mouth of the Erlenmeyer flask may have a lip like a beadball so that it can be capped using cotton cotton or rubber stopper. Alternatively, the neck may be fitted with a female mold so that the glass stopper serves.

use

With the narrowed upper side of the flask and thin neck, it is possible to mix the contents of the flask by turning the gulgles without risk of spilling, which is suitable for titration. Such a feature is also suitable for handling boiling liquids. Hot steam condenses at the top of the flask and can reduce solvent loss. The thin neck of the flask can also support. The latter two features are particularly suitable for use in recrystallization operation.

Erlenmeyer flasks are also used for the preparation of microorganisms. Plastic or glass Erlenmeyer flasks for cell culture are used after sterilization and may be equipped with vent valves to promote gas exchange during incubation or shaking.

In order to prevent illegal drug manufacturers, we restrict sales of Erlenmeyer flasks only to those with necessary permits.

footnote

1. *Andrea Sella (July 2008). "". Royal Society of Chemistry. Viewed 21 May 2015. "Erlenmeyer flask" is American English, in English English it is "conical flask". 2. Emil Erlenmeyer (1860). "Zur chemischen und pharmazeutischen Technik". Zeitschrift fuer Chemie und Pharmacie 3: 21-22. Erlenmeyer took place at the pharmaceutical meeting in Heidelberg in 1857 It is the first time for me to display this new flask, I wrote that it was improved for commercial production and sales by local glassware manufacturers. 3. * Four. Five. ****

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Post Date : 2018-02-19 21:30

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