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Johan Kjeldahl : ウィキペディア英語版 | Johan Kjeldahl
Johan Gustav Christoffer Thorsager Kjeldahl ((:johan ˈkʰɛld̥æːˀl) 1849–1900), was a Danish chemist who developed a method for determining the amount of nitrogen in certain organic compounds using a laboratory technique which was named the Kjeldahl method after him.〔Kjeldahl, J. (1883) ("Neue Methode zur Bestimmung des Stickstoffs in organischen Körpern" ) (New method for the determination of nitrogen in organic substances), ''Zeitschrift für analytische Chemie'', 22 (1) : 366-383.〕 ==Professional life== Kjeldahl worked in Copenhagen at the Carlsberg Laboratory, associated with Carlsberg Brewery, where he was head of the ''Chemistry department'' from 1876 to 1900. He was given the job to determine the amount of protein in the grain used in the malt industry. Less protein meant more beer. Kjeldahl found the answer was in developing a technique to determine nitrogen with accuracy but existing methods in analytical chemistry related to proteins and biochemistry at the time were far from accurate.
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