Edward Frankland

Sir Edward Frankland KCB FRS FRSE
Edward Frankland in his 20s
Born	(1825-01-18)18 January 1825 Catterall, Lancashire, England
Died	9 August 1899(1899-08-09) (aged 74) Gålå, Gudbrandsdal, Norway
Occupation	Research chemist
Known for	Pioneer in water analysis Discoverer of the principle of valency in chemistry Organometallic chemistry Organotin chemistry

Sir Edward Frankland, KCB, FRS, FRSE (18 January 1825 – 9 August 1899) was an English chemist. He was one of the originators of organometallic chemistry and introduced the concept of combining power or valence. An expert in water quality and analysis, he was a member of the second royal commission on the pollution of rivers, and studied London's water quality for decades. He also studied luminous flames and the effects of atmospheric pressure on dense ignited gas, and was one of the discoverers of helium.