Compound Recovery (%) Bond Elut-C18OH HF Bond Elut-C18 Discovery DSC-18 TCS 87.8 87.9 12.8 DIU 74.0 62.4 37.6 17EE 81.2 67.6 24.2 BPA 60.4 51.2 16.0 17E 86.0 73.4 0 CBM 64.7 55.3 26.3 GBD 65.1 58.6 21.2

Table 1: Recoveries using three different SPE cartridges.