Martin Heinrich Klaproth

Martin Heinrich Klaproth
Martin Heinrich Klaproth
Born	1 December 1743(1743-12-01) Wernigerode
Died	1 January 1817(1817-01-01) (aged 73)
Nationality	Prussian (German)
Fields	Chemistry

Martin Heinrich Klaproth (1 December 1743 – 1 January 1817) was a German chemist.

Klaproth was born in Wernigerode. During a large portion of his life he followed the profession of an apothecary. After acting as assistant in pharmacies at Quedlinburg, Hanover, Berlin and Danzig successively he came to Berlin on the death of Valentin Rose the Elder in 1771 as manager of his business, and in 1780 he started an establishment on his own account in the same city, where from 1782 he was pharmaceutical assessor of the Ober-Collegium Medicum. In 1787 he was appointed lecturer in chemistry to the Prussian Royal Artillery, and when the university was founded in 1810 he was selected to be the professor of chemistry. He died in Berlin on New Year's Day in 1817. Klaproth was the leading chemist of his time in Germany.

Memorial plate on the Dorotheenstädtischer Friedhof in Berlin

An exact and conscientious worker, he did much to improve and systematize the processes of analytical chemistry and mineralogy, and his appreciation of the value of quantitative methods led him to become one of the earliest adherents of the Lavoisierian doctrines outside France. Klaproth found the element titanium in the ore rutile in 1791, believing it to be a new discovery, however, William Gregor is credited with the discovery of titanium, having found the metal in a different ore, (ilmenite), before Klaproth, although in the same year. He was the first to discover uranium while studying the mineral pitchblende.^[1] In addition, he discovered zirconium, and to characterize uranium and zirconium as distinct elements, though he did not obtain any of them in the pure metallic state; and he elucidated the composition of numerous substances till then imperfectly known, including compounds of the then newly recognized elements: tellurium, strontium, cerium and chromium.

His papers, over 200 in number, were collected by himself in Beiträge zur chemischen Kenntnis der Mineralkörper (5 vols., 1795–1810) and Chemische Abhandlungen gemischten Inhalts (1815). He also published a Chemisches Wörterbuch (1807–1810), and edited a revised edition of F. A. C. Gren’s Handbuch der Chemie (1806).

Klaproth was elected a foreign member of the Royal Swedish Academy of Sciences in 1804.

The crater Klaproth on the Moon is named after him.

His son Julius was a famous orientalist.^[2]

Notes

1. ^ Klaproth, M. H. (1789). "Chemische Untersuchung des Uranits, einer neuentdeckten metallische Substanz". Chem. Ann. Freunde Naturl. (2): 387–403. 
2. ^ Walravens, H (2006). "Julius Klaproth. His Life and Works with Special Emphasis on Japan". Japonica Humboldtiana 10: 177–191. http://edoc.hu-berlin.de/japonica-hu/10/walravens-hartmut-178/PDF/walravens.pdf. 

References

 This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed (1911). Encyclopædia Britannica (11th ed.). Cambridge University Press. 

• Hoppe, G; Damaschun F, Wappler G (April 1987). "[An appreciation of Martin Heinrich Klaproth as a mineral chemist]". Pharmazie 42 (4): 266–7. PMID 3303064. 
• Sepke, H; Sepke I (August 1986). "[The history of physiologic chemistry in the first years of its existence at the Berlin University. Contributions of the chemist M. H. Klaproth and others]". Zeitschrift für die gesamte Hygiene und ihre Grenzgebiete 32 (8): 504–6. PMID 3535265. 
• Rocchietta, S (February 1967). "[The pharmacist Martin Klaproth (1743-1817), pioneer of modern analytical chemistry, discoverer of uranium. On the 150th anniversary of his death]". Minerva Med. 58 (13): 229. PMID 5336711. 
• Dann, G E (July 1958). "[Scheele & Klaproth; a comparison.]". Svensk farmaceutisk tidskrift 62 (19-20): 433–7. PMID 13580811. 
• Dann, G E (September 1953). "[Contribution of Martin Heinrich Klaproth to the development of chemistry.]". Pharmazie 8 (9): 771–9. PMID 13120350. 
• Walravens, H (2006). "Julius Klaproth. His Life and Works with Special Emphasis on Japan". Japonica Humboldtiana 10: 177–191. http://edoc.hu-berlin.de/japonica-hu/10/walravens-hartmut-178/PDF/walravens.pdf. 

External links

• Publication list of Klaproth

Persondata
Name	Klaproth, Martin Heinrich
Alternative names
Short description	German chemist
Date of birth	1 December 1743
Place of birth	Wernigerode
Date of death	1 January 1817
Place of death	Berlin