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LONDON (AP) _ Archer Martin, a Nobel prize-winning chemist who developed a cheap and reliable method of separating the components of complex mixtures, has died at the age of 92, according to published reports.

Martin died July 28, the Guardian newspaper reported Monday. The cause and place of death were not disclosed. The Daily Telegraph also published an obituary on Saturday.

Martin and Richard Synge won the Nobel Prize for Chemistry in 1952 for the development of partition chromatography, a technique for separating solutions into their component parts.

Martin and Synge developed the process while working for the wool industry in the 1940s. Their technique, which used solvents to separate the components of a mixture into a spectrum called a chromatogram, allowed scientists to analyze the structures of proteins and other complex organic substances.

Martin later worked on gas chromatography, which uses a porous solid to separate chemical vapors.

The London-born son of a doctor, Martin studied biochemistry at Cambridge University, and went on to hold both academic and commercial research posts. He studied vitamin E deficiency for a nutritional laboratory, worked for the Wool Industries Research Association, for the Boots pharmacy chain and for Britain's Medical Research Council.

After retirement he taught at the University of Sussex and was a visiting professor at the University of Houston in Texas and the Ecole Polytechnique Federale de Lausanne in Switzerland.

He is survived by his wife, Judith, three daughters and two sons.