Kjeldahl flask
Kjeldahl flask with a sample of slurry in boiling sulfuric acid for the determination of total nitrogen
The Kjeldahl flask is a long-necked, pear-shaped round glass flask that can also be equipped with a standard ground joint . It was named after the Danish chemist Johan Kjeldahl (1849–1900) who used it as an aid for wet digestions, e.g. B. to simplify the method also named after him for nitrogen determination . The Kjeldahl flask is then also used to distill organic substances for analytical purposes. The flask is held at an angle when heating. The production of the Kjeldahl pistons is based on DIN 12 360.
Individual evidence
- ↑ Otto-Albrecht Neumüller (Ed.): Römpps Chemie-Lexikon. Volume 3: H-L. 8th revised and expanded edition. Franckh'sche Verlagshandlung, Stuttgart 1983, ISBN 3-440-04513-7 , p. 2117.
- ^ Brockhaus ABC Chemie , VEB FA Brockhaus Verlag Leipzig 1965, p. 677.