The optimization and validation of the GC-MS method for assessment of volatile aroma compounds in cheese

This work deals with the introducing of the method for the determination of volatile aroma active compounds in different types of natural and processed cheeses. The theoretical part describes the basic groups of aroma compounds. Than the methods used for their determination with focusing on solid phase microextraction and gas chromatography coupled with mass spectrometry are described. The experimental part deals with the optimization of the selected method parameters. For extracting volatile substances from the sample matrix the fiber DVB/CAR/PDMS 50/30 m was selected, these compounds were then determined by gas chromatography coupled with mass spectrometry. In the frame of validating proces the repeatability of the method was verified, RSDs of retention time