What does cold finger mean?
Definitions for cold finger
cold fin·ger
This dictionary definitions page includes all the possible meanings, example usage and translations of the word cold finger.
Wiktionary
cold fingernoun
A piece of laboratory equipment used for creating a cold spot on a surface.
Wikipedia
Cold finger
A cold finger is a piece of laboratory equipment that is used to generate a localized cold surface. It is named for its resemblance to a finger and is a type of cold trap. The device usually consists of a chamber that a coolant fluid (cold tap water, or perhaps something colder) can enter and leave. Another version involves filling the device with a cold material (examples: ice, dry ice or a mixture such as dry ice/acetone or ice/water).Typically a cold finger is used in a sublimation apparatus, or can be used as a compact version of a condenser in either reflux reaction or distillation apparatus. Many commercially available rotary evaporators can be purchased with a cold finger in place of a Dimroth condenser, for example. When used as a condenser in a rotary evaporator, cold fingers can be cooled to a lower temperature of −78 °C (dry ice), compared with water condensers that can be cooled to −40 °C (ethylene glycol/water mixture). The lower temperature achieved reduces the quantity of volatile material exhausted into the air.
Wikidata
Cold finger
A cold finger is a piece of laboratory equipment that is used to generate a localized cold surface. It is named for its resemblance to a finger as is a type of cold trap. The device usually consists of a chamber in which a coolant fluid can enter and leave. Another version involves filling the device with a cold material. Typically a cold finger is used in a sublimation apparatus, or can be used as compact version of a condenser in either reflux reaction or distillation apparatus. Many commercially available rotary evaporators can be purchased with a cold finger in place of a Dimroth condenser, for example. When used as a condenser in a rotary evaporator, cold fingers can be cooled to a lower temperature of −78 °C, compared with water condensers that can be cooled to −40 °C. The lower temperature achieved reduces the quantity of volatile material exhausted into the air.
Numerology
Chaldean Numerology
The numerical value of cold finger in Chaldean Numerology is: 5
Pythagorean Numerology
The numerical value of cold finger in Pythagorean Numerology is: 3
Translations for cold finger
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"cold finger." Definitions.net. STANDS4 LLC, 2024. Web. 3 May 2024. <https://www.definitions.net/definition/cold+finger>.
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