Sand bath

Sand bath

A sand bath is a common piece of laboratory equipment made from a container filled with heated sand. It is used to provide even heating for another container, most often during a chemical reaction.

A sand bath is most commonly used in conjunction with a hot plate or heating mantle. A beaker is filled with sand or metal pellets (called shot) and is placed on the plate or mantle. The reaction vessel is then partially covered by sand or pellets. The sand or shot then conducts the heat from the plate to all sides of the reaction vessel. This technique allows a reaction vessel to be heated throughout with minimal stirring, as opposed to heating the bottom of the vessel and waiting for convection to heat the remainder, cutting down on both the duration of the reaction and the possibility of side reactions that may occur at higher temperatures.

A variation on this theme, a water bath, can be used to keep a reaction vessel at precisely 100°C at sea level. The sand is replaced with water. The water is boiled and thus will maintain the temperature of 100°C until all water is evaporated (see Standard enthalpy change of vaporization).

Sand baths are one of the oldest known pieces of laboratory equipment, having been used by the alchemists. In Arabic alchemy, a sand bath was known as a "qadr".Georges C. Anawati, "Arabic alchemy", p. 868, in Harv|Rashed|Morelon|1996|pp=853-902] In Latin alchemy, a sand bath was called "balneum siccum", "balneum cineritium", or "balneum arenosum".

Notes

References

*1728 [http://digicoll.library.wisc.edu/cgi-bin/HistSciTech/HistSciTech-idx?type=turn&entity=HistSciTech000900240229&isize=L]
*Harvard reference
last1=Rashed
first1=Roshdi
last2=Morelon
first2=Régis
year=1996
title=Encyclopedia of the History of Arabic Science
publisher=Routledge
isbn=0415124107

ee also

*heat bath
*water bath


Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Sand bath — Sand Sand, n. [AS. sand; akin to D. zand, G. sand, OHG. sant, Icel. sandr, Dan. & Sw. sand, Gr. ?.] 1. Fine particles of stone, esp. of siliceous stone, but not reduced to dust; comminuted stone in the form of loose grains, which are not coherent …   The Collaborative International Dictionary of English

  • sand bath — n a bath of sand in which laboratory vessels to be heated are partly immersed also a pan for holding the sand * * * the immersion of the body in dry, heated sand …   Medical dictionary

  • sand bath — noun Etymology: sand (I) + bath 1. : a bath of sand in which laboratory vessels to be heated are partly immersed 2. : a shallow or deep pan usually of iron for holding the sand * * * sand bath noun 1. A bath in sand 2. A vessel for …   Useful english dictionary

  • sand bath — smėlio vonia statusas T sritis chemija apibrėžtis Smėlio pripiltas kaitinimo indas. atitikmenys: angl. sand bath rus. песочная баня …   Chemijos terminų aiškinamasis žodynas

  • sand bath — noun A piece of laboratory equipment consisting of a container fitted with heated sand, that is used to provide an even source of heat …   Wiktionary

  • sand bath — deep tub filled with sand …   English contemporary dictionary

  • sand bath — noun a container of heated sand, used in a laboratory to supply uniform heating …   English new terms dictionary

  • sand-bath — …   Useful english dictionary

  • Sand — Sand, n. [AS. sand; akin to D. zand, G. sand, OHG. sant, Icel. sandr, Dan. & Sw. sand, Gr. ?.] 1. Fine particles of stone, esp. of siliceous stone, but not reduced to dust; comminuted stone in the form of loose grains, which are not coherent when …   The Collaborative International Dictionary of English

  • Sand badger — Sand Sand, n. [AS. sand; akin to D. zand, G. sand, OHG. sant, Icel. sandr, Dan. & Sw. sand, Gr. ?.] 1. Fine particles of stone, esp. of siliceous stone, but not reduced to dust; comminuted stone in the form of loose grains, which are not coherent …   The Collaborative International Dictionary of English

Share the article and excerpts

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