This text presents the information needed to design a successful quantitative analysis using mass spectrometric techniques currently available and widely employed. It is devoted to the researchers of different areas, who use mass spectrometry as a detector suitable for the measurements of their interest. * An essential book for the practicing mass spectroscopist * A genuine 'how-to' text for the practitioner focusing on quantification rather than instrumental design and techniques * Up-to-date structured text describing methods, experimental strategy, capabilities and limitations, with data analysis and interpretation * Brings together material widely dispersed in the pertinent literature into one unique source * Internationally recognized group of authors