Previous Page

Collectible Cards

Portrait of Helen Free in caricature style with a background made out of molecules

Helen Murray Free

Chemist and Diagnostic Testing Inventor
Born: 2-20-1923 Pittsburgh, Pennsylvania

Helen Murray Free and her husband Alfred Free developed the first dip-and-read test strips for use in diagnostic testing. Their work revolutionized the field of urinalysis and led to many self-testing systems for people with diabetes. Free holds numerous patents and is a champion of science education and outreach. The American Chemical Society created the Helen M. Free Public Outreach Award to honor her.

Next Page