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The performance of a quartz microbalance based electronic nose (E-nose) and a mass spectrometry based electronic nose (MSE-nose) for tomato aroma profiling has been evaluated. Solid phase micro-extraction (SPME) headspace sampling combined with gas chromatography (GC) has been used as a reference method. In the first experiment, the changes in tomato aroma profiles of two different cultivars have been monitored during shelf life (Days 1, 8, 12 and 19). The score plot of the principal component analysis (PCA) for the E-nose measurements shows a slight shift along the first principal component corresponding to an increasing number of days of shelf life. However, the tomato aroma profiles measured on Days 1 and 8 could not be discriminated by the E-nose. In contrast, MSE-nose score plots indicated an evident change in aroma profile with shelf life. The loading plots of the PCA reveals that mainly …