Laser micro-mass analysis method

There are several methods of ionizing organic materials such as particle bombardment, chemical and field ionization, electron impact, field desorption, and laser pulse. For example, in the laser micro-mass analysis method, a laser pulse is used to supply the necessary energy to volatilize a sample from the surface for mass spectroscopy. 1 1 Mass spectrometry is often used in conjunction with gas chromatography to identify the separated components. The working technology of mass spectrometry is quite complex. [Pg.331]

Preferred methods in trace determination of the elements include atomic absorption spectrometry (AAS), optical emission spectrometry (OES) with any of a wide variety of excitation sources [e.g., sparks, arcs, high-frequency or microwave plasmas (inductively coupled plasma, ICP microwave induced plasma, MIP capacitively coupled micro-wave plasma, CMP), glow discharges (GD). hollow cathodes, or laser vaporization (laser ablation)], as well as mass spectrometry (again in combination with the various excitation sources listed), together with several types of X-ray fluorescence (XRF) analysis [51]. [Pg.17]