. Author manuscript; available in PMC: 2019 Aug 15.

Published in final edited form as: J Chromatogr B Analyt Technol Biomed Life Sci. 2018 Jun 18;1092:359–367. doi: 10.1016/j.jchromb.2018.06.028

Table 3.

Quantitative analysis of SCFAs obtained from biological samples

Compound Name	t_R (min)	Ion used for quantitation (m/z)	Group 1 (μmol/g feces) (n=5)	Group 2 (μmol/g feces) (n=9)
Formic acid	9.06	226	0.12±0.02	0.08±0.00
Acetic acid	9.63	181	23.81±1.26	6.40±0.13
Propionic acid	10.61	181	7.17±0.39	0.75±0.03
Isobutyric acid	10.78	181	0.13±0.02	0.03±0.01
Butyric acid	11.62	181	8.93±1.54	0.48±0.03
2-Methylbutyric acid	11.88	181	0.18±0.02	0.21±0.02
Isovaleric acid	12.08	181	0.12±0.02	0.07±0.00
Valeric acid	12.91	181	0.48±0.03	0.08±0.01