The Rootare-Prenzlow Equation is named for Estonian-American

Estonian-American

The Estonian Americans are citizens or residents of the United States who are of Estonian ancestry, mainly descendants of people who left Estonia before and especially during World War II...

 scientist Hillar Rootare

Hillar Rootare

Hillar M. Rootare , was a physical chemist and materials scientist best known for his work in the development of mercury porosimetry, high pressure liquid chromatography, and formulation of the Rootare-Prenzlow Equation.- Biography :...

 and American scientist Carl Prenzlow, first published in their 1967 paper, "Surface Areas from Mercury Porosimetry Measurements," Rootare, H.M. , and Prenzlow, C.F., 71 J. Phys. Chem. p. 2733 (1967). The equation first formulated a means to calculate cumulative surface areas of porous solids based on data taken in mercury porosimetry

Porosimetry

Porosimetry is an analytical technique used to determine various quantifiable aspects of a material's porous nature, such as pore diameter, total pore volume, surface area, and bulk and absolute densities....

testing. Rootare and Spencer later devised a computer programme to carry out automated calculations, "A Computer Program for Pore Volume and Pore Area Distribution," Rootare & Spencer, Perspectives in Powder Metallurgy (Advanced Experimental Techniques in Powder Metallurgy) p. 225, Plenum Press (New York, London 1970).

The equation can be found at section 2.2.3 here: http://ethesis.helsinki.fi/julkaisut/mat/farma/vk/westermarck/ch2.html