A glass volumeter used in scientific experiments, analysis, testing, and preparation. It measures the amount of liquid contained or dispensed by visually locating the position of the liquid level in relation to the graduations. There are various types, such as flasks, pipettes, burettes, and measuring cylinders, depending on their structure and use. Flasks are divided into "receiving" flasks that take in a fixed amount and "discharging" flasks that dispense a fixed amount. Some flasks have a mechanism to automatically draw in or dispense a set amount of liquid. Since the 1980s, an instrument called a micropipette, which has a precision piston and cylinder, has been widely used in chemical analysis. [Mitsui Kiyoto] [Reference items] | | | | |Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
理化学実験、分析、試験、調剤などに用いるガラス製の体積計。目盛り線に対する液面の位置を視定することによって、収容している液体の量、または排出する液体の量を測る。構造、用途により、フラスコ、ピペット、ビュレット、メスシリンダーなどの種類があり、フラスコについては一定量を取り込む「受け用」と、一定量を排出する「出し用」の区別がある。設定した量の液体を自動的に吸入または排出する機構を備えたものもある。1980年代から、精密なピストン・シリンダーを備えたマイクロピペットとよばれる器械が化学分析などに広く用いられている。 [三井清人] [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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