Frank Henry Field (February 27, 1922 – April 12, 2013) was an American chemist and mass spectrometrist known for his work in the development of chemical ionization.

[4][5] Field took a position as an instructor at the University of Texas at Austin in 1947 and became an assistant professor in 1949.

In 1952, he took a position as a research chemist at Humble Oil in Baytown, Texas, where he, along with Burnaby Munson, discovered chemical ionization.

[4][5] Field was a Guggenheim Fellow in 1963–1964 and was president of the American Society for Mass Spectrometry from 1972 to 1974.

[7] The Frank H. Field and Joe L. Franklin Award for Outstanding Achievement in Mass Spectrometry, given by the American Chemical Society, was created in 1983.