Cold fingers.

Cold finger, a piece of laboratory equipment that is used to generate a localized cold surface, and is name for it resemblance to a finger. Laboratory equipment refers to the various tools and equipment used by scientists working in a laboratory. ... Fingers of the human left hand The finger is any of the digits of the hand in humans and other species such as the great apes. ...

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. Sublimation of an element or substance is a conversion between the solid and the gas phases with no intermediate liquid stage. ... The term condenser has the following meanings: In electronics, it is another (old-fashioned) word for capacitor. ... Diagram of typical reflux apparatus. ... Laboratory distillation set-up using, without a fractionating column 1: Heat source 2: Still pot 3: Still head 4: Thermometer/Boiling point temperature 5: Condenser 6: Cooling water in 7: Cooling water out 8: Distillate/receiving flask 9: Vacuum/gas inlet 10: Still receiver 11: Heat control 12: Stirrer speed...

The device usually consists of a chamber in which a liquid (typically cold tap water) can enter an leave. Another version involves filling the device with a cold solid such as ice, or dry ice. To meet Wikipedias quality standards, this article or section may require cleanup. ... Dry ice is a genericized trademark for solid (frozen) carbon dioxide. ...

Gallery

A cold finger which includes a vacuum outlet.