Study On The Determination Methods Of Hazardous Substance In Food Packaging Materials By Gas Chromatography/Mass Spectrometry

Food packaging has become an important part of food. Food packing security is gradually affect people’s lives. The European Union, the United States and other countries have issued control standards for hazardous substances in food packaging materials. It is important to establish a rapid and accurate detection method for hazardous substances in food packaging materials.In this thesis, paper cups and plastic food packaging materials were selected for research object, headspace gas chromatography and gas chromatography/mass spectrometry techniques were used to develop the methods for determination of hazardous substances in food packaging materials.1. Study on the determination methods of residual solvents for paper cups by Headspace gas chromatography. The main conclusions is:the best balance temperature is100℃, and the best balance time is30min. On this condition,9kinds of residual organic solvents were separated from each other completely. Results showed the good linearity range of this method. The detection limit was0.003mg/m2～0.015mg/m2, the recovery of residual organic solvents was in the range of90.6%～98.3%with the RSD of2.38%～6.60%. The proposed method had been applied to analyze the residual organic solvents in cup samples. Results prove it is a rapid and sensitive method suitable for analysis of residual organic solvents in cup samples.2. Study on the determination methods of4-Methylbenzophenone and Benzophenone for plastic food packaging material by gas chromatography/mass spectrometry. The main conclusions is:microwave extraction (MAE) compared with ultrasonic extraction (USE) and soxhlet extraction (SE), MAE is rapid, efficient and saving solvent. The best extraction temperature is140℃, the optimum extraction time and extraction solvent are6min and20mL methylbenzene, respectively. On this condition, results showed the good linearity range of this method. The detection limit was2×10-5mg/kg. The recovery was94.3%and95.0%with RSD of3.32%and2.72%. The rapid and accurate method has been applied to analyze samples, and can meet the demand of samples analysis.