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Updated: Jun 28, 2026

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
Published on: August 6, 2018
Construction and performance test of a multiplexed multistage (MS(n)) time-of-flight mass spectrometer
Young Sik Shin1, Jeong Hee Moon, Myung Soo Kim
1Department of Chemistry, Seoul National University, Seoul 151-742, Korea.
Abstract:
A time-of-flight mass spectrometer equipped with two reflectrons was constructed for multiplexed photodissociation tandem mass spectrometry of peptide ions generated by matrix-assisted laser desorption ionization. A linear reflectron was used for high-resolution selection of a precursor ion while a quadratic reflectron was used for product ion analysis. With the photoexcitation of a precursor ion inside a cell floated at high voltage, information (MS(3)) on intermediate ions generating a particular product ion was obtained. Fully multiplexed detection resulted in good MS(3) signal levels. Use of the quadratic reflectron allowed intermediate ion mass determination within 4 Da. The possibility of further extending the technique and its analytical potential are discussed.
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