Double distilled water: Difference between revisions
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'''Double distilled water''' (ddH<sub>2</sub>O) is prepared by double [[distillation]] of [[deionized water]]. It is used, among other things, when single distillation does not lead to sufficiently pure water for some applications in [[biochemistry]]. |
'''Double distilled water''' (abbreviated "ddH<sub>2</sub>O" or "Bidest. water") is prepared by double [[distillation]] of [[deionized water]]. It is used, among other things, when single distillation does not lead to sufficiently pure water for some applications in [[biochemistry]]. |
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Bidest. water is used when pure, sterile water is essential. Whereas distilled water is enough for most chemical reactions, a [[molecular biologist]] attempting to create sterile, enzyme-free media might use bidest. water to ensure sterility. |
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Modern molecular biology labs typically use water purification systems such as [[Milli-Q]] (by [[Millipore]]) to create ultra-pure water. |
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==See also== |
==See also== |
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*[[Distilled water]] |
*[[Distilled water]] |
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==External Links== |
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[http://www.millipore.com/labwater/site.nsf/docs/milli-q Official Milli-Q website]] |
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{{chem-stub}} |
{{chem-stub}} |
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[[Category:Forms of water]] |
[[Category:Forms of water]] |
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[[Category:Distillation]] |
[[Category:Distillation]] |
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Revision as of 14:28, 19 October 2005
Double distilled water (abbreviated "ddH2O" or "Bidest. water") is prepared by double distillation of deionized water. It is used, among other things, when single distillation does not lead to sufficiently pure water for some applications in biochemistry.
Bidest. water is used when pure, sterile water is essential. Whereas distilled water is enough for most chemical reactions, a molecular biologist attempting to create sterile, enzyme-free media might use bidest. water to ensure sterility.
Modern molecular biology labs typically use water purification systems such as Milli-Q (by Millipore) to create ultra-pure water.
See also
External Links
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