Cold finger

Cold finger
Cold fingers.

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.

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.

The device usually consists of a chamber in which a liquid (typically cold tap water) 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).

Media

  • Dark green crystals of nickelocene, freshly sublimed on a cold finger.

  • Camphor being sublimed. Note the white purified camphor on the cold finger, and the dark-brown crude product.

  • A cold finger which includes a vacuum outlet.

  • Cold finger used in sublimation

v · d · eLaboratory equipment
Glassware

Beaker · Boston round (bottle) · Büchner funnel · Burette · Cold finger · Condenser · Conical measure · Cuvette · Dean-Stark apparatus · Dropping funnel · Eudiometer · Evaporating dish · Gas syringe · Graduated cylinder · Pipette · Petri dish · Pycnometer · Separatory funnel · Soxhlet extractor · Watch glass

Büchner · Erlenmeyer · Fernbach · Fleaker · Florence · Retort · Round-bottom · Schlenk · Volumetric

Boiling · Ignition · NMR · Test · Thiele · Thistle
Other
See also Instruments used in medical laboratories



Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Cold Finger Girl — Single par Chiaki Kuriyama extrait de l’album Circus Face A Cold Finger Girl Face B Getsumen Nanchakuriku Sortie 26 janvier 2011 …   Wikipédia en Français

  • Finger Lakes AVA — Infobox Wine Region name = Finger Lakes AVA caption = Vineyards near Canandaigua Lake official name = other name = type = American Viticultural Area year = 1982, amended in 1987 [http://ecfr.gpoaccess.gov/cgi/t/text/text… …   Wikipedia

  • Cold trap — For the atmospheric phenomenon, see Cold trap (astronomy). Cold trap immersed in cold medium in Dewar flask. Some workers prefer the opposite arrangement, where vapors flow down the wall of the trap, and are sucked up the inner tube; this reduces …   Wikipedia

  • Finger Eleven — Жанр пост гранж, хард рок Годы 1994 наши дни Страна …   Википедия

  • Cold Spring Harbor State Park — has 40 acres (160,000 m2) of hilly land, offering scenic views of Cold Spring Harbor, New York, USA on the north shore of Long Island. This state park is in the Town of Huntington in Suffolk County. The park offers hiking, birdwatching,… …   Wikipedia

  • Cold Day Memory — Studio album by Sevendust Released April 20, 2010 …   Wikipedia

  • Cold Case (season 2) — Cold Case Season 2 Country of origin  United States No. of episodes 23 …   Wikipedia

  • Cold Asylum —   …   Wikipedia

  • Finger Lakes — The Finger Lakes are a chain of lakes in the west central section of Upstate New York that are a popular tourist destination. There are actually eleven lakes in the region, but only seven of the largest are commonly identified as the Finger Lakes …   Wikipedia

  • finger — {{Roman}}I.{{/Roman}} noun ADJECTIVE ▪ first, index, pointer (AmE) ▪ middle ▪ ring, third, wedding ▪ …   Collocations dictionary

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”