S. P. L. Sørensen
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Søren Peder Lauritz Sørensen, born in Havrebjerg, Denmark on January 9, 1868 and died on February 12, 1939, was a Danish chemist. From 1901 he was head of the prestigious Carlsberg Laboratory, Copenhagen. The important chemical concept pH was introduced by S. P. L. Sørensen.\n

The original article can be found at: http://en.wikipedia.org/wiki/S._P._L._Sørensen.
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