Mass Spectroscopy Scholarly Peer-review Journal MS is an analytical chemistry technique that measures both the abundance of gas-phase ions and the mass-to - charge ratio. The ions are detected by a device capable of detecting charged particles, like a multiplier for electrons. Articles in the journal come from proteomics, metabolomics, petroleomics and other areas that develop under the "omic revolution" umbrella. Mass spectrometry, an instrumental method for identifying a substance's chemical composition by separating gaseous ions according to their different masses and charges, also known as mass spectroscopy.