Reichert value

Reichert value

The Reichert value (or more fully, the Reichert-Meissl-Wollny value or Reichert-Meissl-Wollny number) is a value determined when examining fat. The Reichert value is an indicator of how much volatile fatty acid can be extracted from fat through saponification. It is equal to the number of mililiters of 0.1 normal hydroxide solution necessary for the neutralization of the water-soluble volatile fatty acids distilled and filtered from 5 grams of a given saponified fat. (The hydroxide solution used in such a titration is typically made from sodium hydroxide, potassium hydroxide, or barium hydroxide.) [Food and Agriculture Organization and World Health Organization. (2001). "The Codex Alimentarius". Rome:FAO/WHO. Volume 8: Fats and Oils, " [http://www.fao.org/docrep/004/Y2774E/y2774e06.htm#fnB15 Section 4.9.1: Estimation of Milk Fat Content] ". ISBN 92-5-104682-4]

This number is a useful indicator of non-fat compounds in edible fats, and is especially high in butter.

The value is named for the chemists who developed it, Emil Reichert and Emerich Meissl. [ [http://www2.merriam-webster.com/cgi-bin/mwmednlm?book=Medical&va=reichert-meissl+number "Reichert-Meissl number"] , "Merriam-Webster Medical Dictionary" (online).]

The Polenske value and Kirschner value are related numbers based on similar tests.

References

External links

* [http://www.lebensmittelchemie.uni-bonn.de/mats/UDLM/U-Margarine.pdf Untersuchung einer Margarine] (in German)


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  • Reichert value — n a value that indicates the content in fat (as butter) of water soluble volatile fatty acids (as butyric acid or caproic acid) esp REICHERT MEISSL NUMBER …   Medical dictionary

  • reichert value — noun or reichert number Usage: usually capitalized R Etymology: after Karl Reichert, 19th century German chemist : a value that indicates the content in butter or other fat of the water soluble volatile fatty acids (as butyric acid, caproic acid …   Useful english dictionary

  • Reichert — may refer to:* Dan Reichert * Dave Reichert * Don Reichert * John Christoph Reichert * Karl Bogislaus Reichert * Marcus Reichert * Mickey Zucker Reichert * Ossi Reichert * Tanja Reichertee also* Reichert value …   Wikipedia

  • Reichert-Meissl number — Rei·chert Meissl num·ber rī kərt mī səl .nəm bər n a Reichert value expressed as the milliliters of tenth normal alkali required to neutralize the acids obtained from five grams of fat by a specified method of saponification and distillation… …   Medical dictionary

  • reichert-meissl number — noun or reichert meissl value ˈrīkə(r)t, ˈmīsəl Usage: usually capitalized R&M Etymology: after Karl Reichert and E. Meissl, 19th century German chemists : a Reichert value expressed as the milliliters of tenth normal alkali required to… …   Useful english dictionary

  • reichert number — noun see reichert value …   Useful english dictionary

  • reichert-meissl value — noun see reichert meissl number …   Useful english dictionary

  • Polenske value — The Polenske value (also known as the Polenske number) is a value determined when examining fat. The Polenske value is an indicator of how much volatile fatty acid can be extracted from fat through saponification. It is equal to the number of… …   Wikipedia

  • Kirschner value — The Kirschner value (also known as the Kirschner number) is a value determined when examining fat. The Kirschner value is an indicator of how much volatile fatty acid can be extracted from fat through saponification. It consists of the number of… …   Wikipedia

  • Polenske value — Po·len·ske val·ue pō len(t) skə .val (.)yü n a value similar to a Reichert value that indicates the content in butter or other fat of the volatile water insoluble acids (as capric acid and lauric acid) called also Polenske number Polenske Eduard… …   Medical dictionary

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