Observational Study
Copyright ©The Author(s) 2019.
World J Gastroenterol. Sep 28, 2019; 25(36): 5543-5558
Published online Sep 28, 2019. doi: 10.3748/wjg.v25.i36.5543
Table 3 Compositions and concentrations of standard and internal standards mixtures
Mixt-ureAcetic ac. (µg/mL)Propionic ac. (µg/mL)Butyric ac. (µg/mL)isoButyric ac. (µg/mL)Valeric ac. (µg/mL)isoValeric ac. (µg/mL)
Mix 11000050005000100010001000
Mix 21000500500100100100
[2H3]Acetic (µg/mL)[2H3]Propionic (µg/mL)[2H7]iso-Butyric (µg/mL)[2H9]iso-Valeric (µg/mL)
ISTDs1000500100100