Advanced Sample Preparation Techniques for the Analysis of Food Contaminants and Residues

Pat Sandra, Frank David and Gerd Vanhoenacker

Contents 1. Introduction 131

2. Sample Preparation Methods for VOCs 133

2.1 Static headspace (SHS) 134

2.2 Dynamic headspace (DHS) 134

2.3 Solid phase microextraction (SPME) 135

2.4 Headspace sorptive extraction (HSSE) 136

2.5 Selected applications 136

3. Sample Preparation Methods for SVOCs and NVOCs 138

3.1 Solid samples 140

3.2 Liquid samples 148

4. Fractionation and Clean-Up 162

4.1 Chemical methods 163

4.2 Chromatographic methods 163

4.3 Gel permeation chromatography 164

4.4 On-line techniques 165

4.5 Selected applications 167

5. Evaporation 170

6. Derivatization 170

7. Conclusion 171 References 172

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