For 10 points, name this technique of organic chemistry that breaks a compound into smaller ions and measures their mass-to-charge ratio.
Important advancements in this technique include the use of the reflectron to improve resolution in the MALDI version, which uses an ultraviolet laser with wavelength between 330 and 360 nm.  Another version of this technique begins with the formation a Taylor Cone and won John Fenn a Nobel Prize in Chemistry; that version is known as Electrospray Ionization.  Once the sample is ionized, the next step is usually either gas or liquid chromatography, and the final readout contains the base peak and molecular ion peak.  For 10 points, name this technique of organic chemistry that breaks a compound into smaller ions and measures their mass-to-charge ratio.
Important advancements in this technique include the use of the reflectron to improve resolution in the MALDI version, which uses an ultraviolet laser with wavelength between 330 and 360 nm.  
{mass spec}trometry