Casimir Wurster

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Wurster's blue reagent

Casimir Wurster , also Kasimir (born August 7, 1854 Weidenthal , † November 29, 1913 in Dresden ), was a German chemist.

Wurster was the son of a cloth and paper manufacturer. The philologist Wilhelm Studemund was his brother-in-law, the writer Catherina Godwin his niece. Wurster studied chemistry in Strasbourg, Stuttgart, Heidelberg and Zurich. At the ETH Zurich he was assistant to Victor Meyer and received his doctorate there in 1873. He was a private lecturer at the ETH and at the Veterinary School of the Canton of Zurich. In 1876 he was in Paris, in 1877 assistant to Rudolph Fittig in Strasbourg, in 1878 at the University of Munich and from 1886 to 1889 at the Physiological Institute of the University of Berlin. In the latter, he investigated the possibility of detecting oxygen directly in the organism and the oxidation of proteins with nitric acid and hydrogen peroxide. He also worked in various companies as an industrial chemist, for example in New York and London.

In his father's cloth factory in the Strasbourg suburb of Robertsau , which was converted into a paper manufacture in 1872, Casimir Wurster familiarized himself with the chemical processes involved in paper production and especially with sizing. Building on this, he later developed various processes and apparatus for the paper and textile industry. Wurster's reagent (Wurster's blue) is named after him ( tetramethylphenylenediamine , TMPD), which is easily oxidizable and serves as a redox indicator (with a color change to blue, hence the name), for example as a test for oxidase such as cytochrome c in microbiology. Wurster used it as an indicator of wood pulp in paper. A similar redox indicator ( dimethylphenylenediamine ) turns red and is therefore called Wurster's red. Wurster called it Di-Solution or Di-Paper (depending on the form of use, application as a solution or as filter paper) and also used to determine wood pulp. Alternatively, aniline sulfate and phloroglucinol were often used to determine wood pulp analysis in paper analysis ( lignin detection). Casimir Wurster also owned an extensive collection of paintings.

Fonts

  • Casimir Wurster: Quantitative determination of the wood pulp in paper . In: Reports of the German Chemical Society . tape 20 , no. 1 , 1887, p. 808-810 , doi : 10.1002 / cber.188702001183 .
  • Casimir Wurster: Use of tetramethylparaphenylenediamine for the quantitative estimation of active oxygen . In: Reports of the German Chemical Society . tape 21 , no. 1 , 1888, p. 921-924 , doi : 10.1002 / cber.188802101174 .
  • Casimir Wurster: Active oxygen in living tissue . In: Reports of the German Chemical Society . tape 21 , no. 1 , 1888, p. 1525–1528 , doi : 10.1002 / cber.188802101282 .
  • Casimir Wurster: The new reagents on groundwood and lignified plant parts for determining the groundwood in paper. Berlin: Friedländer 1900.

literature

Individual evidence

  1. ↑ (The paper manufacturer, born 1929, vol. 27, p. 140)
  2. ^ Wilhelm Herzberg, paper examination, Springer 1902.
  3. ↑ Catalog of the extensive painting collection of Dr. Casimir Wurster Strasbourg i. E. , auction catalog, J. M. Heberle, Cologne 1896. In: archive.org. Retrieved January 19, 2016 .
personal data
SURNAME Wurster, Casimir
BRIEF DESCRIPTION German chemist
DATE OF BIRTH August 7, 1854
PLACE OF BIRTH Weidenthal
DATE OF DEATH November 29, 1913
Place of death Dresden