Jeanette Grasselli Brown (born Jeanette Gecsy; August 4, 1928) is an American analytical chemist and spectroscopist who is known for her work with Standard Oil of Ohio (now BP America) as an industrial researcher in the field of spectroscopy.
Spectroscopy is a technique used to measure the interaction of electromagnetic radiation with matter. Her areas of expertise encompass fields such as vibrational spectroscopy, combined instrumental techniques, computerized spectroscopy, and environmental spectroscopy. She developed new techniques to solve problems like identifying contaminants in gasoline, analyzing the makeup of new plastics, and analyzing environmental problems such as pollution.
During her career, Grasselli Brown has striven to bridge the gap between research and practical applications between industry and academia. She is considered one of the foremost contributors to infrared and Raman spectrometry of the 20th century.