Kolthoff, Izaak Maurits (1894–1993)

Izaak Maurits Kolthoff was a professor of analytical chemistry at the University of Minnesota from 1927 to 1962. He published over a thousand papers, wrote more than a dozen books, and created and edited the first comprehensive treatise of analytical chemistry. He also played a key part in the development of synthetic rubber during and after World War II. He is known as the “father of modern analytical chemistry.”

2014 Chemical Landmark Award program cover

2014 Chemical Landmark Award program cover

Cover of program for the event held to announce the winner of the Chemical Landmark Award, 2014. Izaak Kolthoff is pictured at top right. Used with the permission of the University of Minnesota Department of Chemistry.

Izaak Kolthoff

Izaak Kolthoff

Izaak Kolthoff, 1952. Used with the permission of the University of Minnesota Department of Chemistry.

Izaak Kolthoff lecturing in Russia, 1958.

Izaak Kolthoff lecturing in Russia

Izaak Kolthoff lecturing in Russia, 1958. Used with the permission of the University of Minnesota Department of Chemistry.

Izaak Kolthoff

Izaak Kolthoff

Izaak Kolthoff, 1932.

Photograph of Dr. John B. Dalton

Dr. John B. Dalton

Dr. John B. Dalton, 1936.

Lie-detector test

Lie-detector demonstration

Dr. J. B. Dalton demonstrating a lie-detector machine to Olivia Johnson, St. Paul Police Department, ca. 1935. Photograph by the St. Paul Daily News.

Photograph of Dr. John B. Dalton demonstrating a comparison microscope

Dr. John B. Dalton demonstrating a comparison microscope

Dr. John B. Dalton demonstrates a comparison microscope, ca. 1935.

Ecolab, Inc.

Ecolab, Inc., is a public company that provides hygiene, water, and energy products and services. It was founded in 1923 as Economics Laboratory in St. Paul. By 2017, it employed 38,000 workers in over 170 countries, served customers in more than 1.3 million locations, and reported annual sales of $13 billion. It counted among its employees 1,600 scientists and held 6,300 patents.

Color image of emotely sensed image of a farm field illustrating vegetation density, water deficit, and crop stress, 2010.

Remotely sensed maps of a farm field

Remotely sensed image of a farm field illustrating vegetation density, water deficit, and crop stress. Photographed in 2010 by Susan Moran for the Landsat 7 Science Team and USDA Agricultural Research Service.

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