Difference between revisions of "Weighing bottle"
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Revision as of 20:39, 25 February 2018
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Weighing bottles (or weighing dish) are glass laboratory equipment used for precise weighing of solids.
Contents
General
Weighting bottles consist of a thin beaker with a large ground glass joint and no spout. The lid also has a ground glass and a central handle to handle it. Weighing bottles have a space for writing the weight of the bottle on the side.
There are three main types of weighing bottles:
- Flat glass dish: equipped with a ground cover. In the case of a bowl in which the weighed substances are hygroscopic and decomposed when exposed to moisture or in contact with air, the sample is bottled in an atmosphere of nitrogen, and then weighed in the sealed glass container.
- Flat boat dish: an oblong, flat-bottomed dish, in which it is easy to weigh out the substance, and then move it the reaction chamber, but is not recommended for hygroscopic or air-reactive samples.
- A tall-shaped dish: it is elongated, oblong, flat-bottomed dish, used when the solid is transferred without a funnel.
Availability
Weighing bottles can be bought from lab suppliers and online.
DIY weighing bottle
You can use a small volume flask with ground glass joint as weighting bottle. A 50 or 100 ml Erlenmeyer flask with a 19/24 or 24/29 ground glass joint can be a good replacement.
