The GGT 0620 Comprehensive Two dimensional Gas Chromatography Time of Flight Mass Spectrometer (GC × GC-TOFMS) uses a new type of full two-dimensional solid state thermal modulation technology and high-throughput time-of-flight mass spectrometry detection technology to provide professional products and technical services for environmental organic pollutant monitoring, food safety and food flavor detection, volatile oil composition analysis of traditional Chinese medicine, petroleum and petrochemical product analysis, essence and fragrance analysis, metabonomics research and other fields. Compared with conventional GC-MS, this system has the characteristics of large peak capacity, high resolution, high sensitivity, group separation, tile effect, etc., and has good advantages for the full component analysis of complex samples. Combining the rapid analysis characteristics of time-of-flight mass spectrometry, the entire system has the performance of high acquisition rate, high sensitivity, high resolution, and high-quality accuracy. This collection is a collection of case studies on the application of the GGT 0620 two-dimensional gas chromatography time-of-flight mass spectrometer in food.