The trace determination of pesticides continues to be a topic for analytical chemists working in research centres, government and universities. With four chapters devoted to chromatography-mass spectrometry methods, readers are able to understand the analytical basis, technical characteristics and possibilities to evaluate pesticides in food by gas chromatography (GC) and liquid chromatography (LC) mass spectrometry. The book also provides a well-defined and critical compilation of the sample treatment and clean-up procedures, as well as injection techniques applied in GC and LC food analysis. Finally the book deals with aspects related to analytical quality control requirements for pesticide residues, in addition to pesticide regulation aspects.