Originally developed for the brewing industry

These flasks were originally developed in the 19th century by Johan Gustav Kjeldahl for use in his new apparatus for the determination of nitrogen. At the time, Kjeldahl was working for the Carlsberg brewing company.

  • For the determination of nitrogen by the Kjeldahl method
  • Extra long necks act as air condensers during digestion stage and reduce entrainment during distillation stage
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The Kjeldahl method of nitrogen determination imposes severe demands on glassware.

Product Specification

Grouped product items
Item Code Socket size Nominal capacity ml Pack quantity
FK300/3L 24/29 300 1
FK500/3L 24/29 500 1
FK800/3L 24/29 800 1

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pyrex flasks