Growth into a Scientific Discipline: The Nineteenth Century - Important Figures of Analytical Chemistry from Germany in Brief Biographies - page 52

Fig. 3.3 Portrait of Otto
Linn￩ Erdmann (1804-1869)
Heidelberg in 1828. After a short time in Berlin (at Heinrich Rose), he went back
and graduated with a PhD in Heidelberg in 1832. Again, he came back to the
paternal pharmacy in Bonn, which he took over after his father died.
Mohr then entered a chemical factory, but habilitated in Berlin and subse-
quently in Bonn, and was appointed Professor of Pharmacy at the Rheinische
Friedrich-Wilhelms-Universität Bonn in 1867.
He made essential contributions to volumetric analysis and inaugurated the
argentometric titration of chlorides with silver nitrate or vice versa. He wrote a
textbook on volumetry Lehrbuch der chemisch - analytischen Titrirmethode
(Textbook of the chemical-analytical titration method) [ 25 ], and published the
topics Lehrbuch der pharmaceutischen Technik [ 26 ] and Chemische Toxicologie,
Anleitung zur chemischen Ermittlung der Gifte (Chemical Toxicology. Guide to
the chemical detection of poisons) [ 27 ]. Another topic on geology relects the wide
scope of his scientific activity [ 28 ].
Mohr (for portrait see Fig. 3.4 ) has introduced various tools into the analyti-
cal laboratory, e.g. the Mohr balances, the cork drill, the scaled burette and the
squeeze tap.
He was also very active in public life as member of several associations, of the
City Council and of committees and as elected delegate to the Prussian parliament
in Berlin.
The impact of Carl Friedrich Mohr on volumetric analysis has been discussed
in two doctoral theses [ 29 , 30 ].
Eduard Hugo R einsch (born 1809, died 1884)
He was the Professor of Chemistry at the Agrikulturschule (agricultural school)
Erlangen. Reinsch is renowned mainly by his wet chemical test for arsenic and