0 a piece of equipment used by scientists to separate ions into groups to measure and compare their mass and electrical charge -- 质谱仪
The development of the mass spectrometer allowed the exact mass of atoms to be measured.
Subsequently, one or more chromatographic separations are applied to resolve resulting peptides, which are then ionized and analyzed in a mass spectrometer.
The mass spectrometer was a new tool for examining the structures of small botanical molecules.
This will produce a set of peptides that can be analysed using a mass spectrometer.
This method employed devices known as calutrons, a hybrid of the standard laboratory mass spectrometer and cyclotron.
It was speculations about isotopy that directly gave rise to the building of a mass spectrometer capable of separating the isotopes of the chemical elements.
The mass spectrometer does this by breaking each molecule into ionized fragments and detecting these fragments using their mass-to-charge ratio.
These salts are not volatile, so this technique is less useful with a mass spectrometer as the detector.