S. P. L. Sørensen
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