A type of chemical laboratory equipment, a container used for drying and storing hygroscopic solids and liquids. It is usually made of thick glass, and the lid and the container body are ground together to fit tightly together. The container body has a structure in which the bottom plate is held by a constriction, and the desiccant is placed under the bottom plate, and the sample is placed on the bottom plate. It is common to apply a thin layer of grease to the mating parts of the lid and body to improve adhesion, but it is better not to apply grease when drying iodine or using concentrated sulfuric acid as a desiccant. There are also light-blocking containers made of brown glass, and containers for drying under reduced pressure that have a side tube with a cock extending from the lid or body, but when using under reduced pressure, care should be taken to prevent breakage (explosive scattering of fragments) by wrapping tape around them, etc. [Iwamoto Shinbu] [Reference] |Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
化学実験器具の一つで、吸湿性の固体、液体の乾燥、保存などに利用される容器。通常は厚肉ガラス製で、蓋(ふた)と容器本体とはすり合わせで密着するように加工されている。 容器本体はくびれによって底板を保持する構造をとり、底板下に乾燥剤、底板上に試料を置く。蓋と本体とのすり合わせ部分には薄くグリースを塗って密着性を高めるのが普通であるが、ヨウ素の乾燥や、濃硫酸を乾燥剤とするときには塗らないほうがよい。褐色ガラス製の遮光用のもの、あるいは蓋または本体からコック付き側管を出した減圧乾燥用のものもあるが、減圧使用時にはテープを巻き付けるなどして、破損(爆発的に破片が飛散する)に注意する。 [岩本振武] [参照項目] |出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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