Uses of mass spectrometry in carbon dating
Further the incoming energy of the same laser pulse can sustain high temperature plasma ( 10,000 K) in which the vaporized species can be excited and return later to their less energetic levels by emitting electromagnetic radiation.
These wavelengths can be selectively associated to the presence of the analytes and whose intensity is proportional to their content in the sample.
A radiação emitida é analisada por meio de instrumentos ópticos de alta resolução e as suas intensidades são medidas, usualmente com detectores rápidos de estado sólido.
This review describes a modern analytical technique based on emission spectroscopy that employs a short pulse of high energy radiation generated by a laser focused on a sample, in order to attain representative vaporization and excitation.Of course many efforts have been devoted to minimize or even eliminate the necessity of sample treatment.A good example is the use of electrical arcs or sparks for vaporization and excitation of conductive samples such as metallic alloys.The emitted radiation is analyzed by high resolution optics and the intensities are recorded, usually by fast triggered solid state detectors.Together, these devices allow producing and registering a wide ranging emission spectrum of the short-lived phenomenon induced by the laser pulse.