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• 10:17, 31 March 2025 Kkmurray talk contribs created page Judson 1997 (Created page with "<big>Early History of Mass Spectrometer Ionization Methods</big> Charles M. Judson University of Kansas, Lawrence, KS, 66045 ==Gas Discharge== Goldstein 1886 discovered anode rays in a gas discharge. This method was used in the early mass analysis measurements of Wien (1898), Thomson (1912), and Aston (1919). In 1921, Aston extended this method to use a heated anode and then a composite anode made of a paste of powdered carbon mixed with sample. Later in 1936 Bainbrid...")