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. 2012 Aug 29;7(8):e43848. doi: 10.1371/journal.pone.0043848

Table 1. The analytical condition of LC-MS/MS for the identification of the nine compounds and internal standard.

Compounds	Molecular weight	RT (min)	Mass fragments
			Q1 Mass (amu)	Q3 Mass (amu)
Astragaloside I	869.04	11.21	886.6 [M+NH₄]⁺	143.2
Astragaloside II	827.01	10.73	844.5 [M+NH₄]⁺	143.2
Astragaloside IV	784.97	11.18	802.6 [M+NH₄]⁺	143.2
Formononetin	268.26	8.32	269.2 [M+H]⁺	253.2
Ononin	430	8.23	431.3 [M+H]⁺	269.2
Calycosin	284.2	8.72	285.2 [M+H]⁺	270.2
Calycosin-7-O-β-D-glucoside	446.4	7.68	447.2 [M+H]⁺	285.1
Ligustilide	190.24	10.05	208.1 [M+NH₄]⁺	173.2
Paeoniflorin	480.47	7.37	498.3 [M+NH₄]⁺	179.2
Digoxin (IS)	780.94	9.12	798.6 [M+NH₄]⁺	651.6