Mass spectrometry (MS) is an analysis technique which measures the ion mass-to - charge ratio. These spectra are used to determine a sample's elementary or isotopic signature, particle and molecular masses, and to elucidate the chemical identity or structure of molecules and other chemical compounds. Clinical Mass Spectrometry publishes peer-reviewed articles in Laboratory Medicine and Clinical Pathology on the application of mass spectrometric technologies with a focus on diagnostic applications. Mass spectrometry (MS) is a twenty-first - century, mainstream chemical analysis technique. It has contributed to numerous chemical , physical, and biochemical discoveries. Hundreds of research laboratories scattered around the globe use MS every day to investigate fundamental molecular phenomena. Mass spectrometry journal or Article is sometimes called a Scientific Article, a Peer-Reviewed Article, or a Scholarly Research Article.