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. Author manuscript; available in PMC: 2014 May 28.
Published in final edited form as: J Chromatogr B Analyt Technol Biomed Life Sci. 2010 Mar 6;878(0):994–1002. doi: 10.1016/j.jchromb.2010.02.032

Table 4.

Calculated % matrix effects of serum on the peak area response of phytoestrogens and internal standard

Analyte Concentration (ng/mL) Matrix effect (%)
Equol 50 2.78
500 18.28
2000 4.55
Daidzein 50 16.38
500 9.08
2000 2.51
Dihydrodaidzein 50 13.22
500 15.21
2000 3.00
O-DMA 50 1.22
500 14.52
2000 −0.41
Genistein 50 30.99
500 28.51
2000 3.84
Glycitein 50 21.01
500 25.33
2000 −0.55
Formononetin 50 34.95
500 28.18
2000 4.50
Coumestrol 50 31.90
500 20.57
2000 −2.42
Biochanin A 50 23.82
500 14.85
2000 20.62
Enterodiol 50 15.15
500 9.82
2000 −12.03
Enterolactone 50 −13.66
500 1.65
2000 −12.29
Chrysin (IS) 200 25.09%