Samples Number of VOCs ± S.D.
(VOCs in every technical replicate)
VOCs with CV < 30% (%)
Sample 1 24± 3 (19) 100
Sample 2 23± 1 (18) 100
Sample 3 20± 2 (12) 92
Sample 4 48± 5 (36) 89
Sample 5 37± 4 (26) 81
Sample 6 50± 4 (39) 95
Sample 7 32± 2 (21) 90
Sample 8 26± 4 (18) 67
Sample 9 26± 2 (19) 95
Sample 10 27± 2 (18) 94
Table 2: Repeatability of method. Ten biological replicates of human faecal samples were divided in triplicates and analysed by solid phase micro-extraction coupled to gas chromatography-mass spectrometry (SPME-GC-MS). The average number of volatile organic compounds (VOCs) and the standard deviation associated to each biological replicate is presented together with the number of VOCs in every technical replicate and the percentage of compound abundances showing a coefficient of variation (CV) smaller than 30%.
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