Analytes were extracted using 60 mg/3mL Oasis HLB cartridges (Waters, Millford, MA). Cartridges were preconditioned with 3mL of MeOH, 3mL of 0.5N HCl, and 3mL of deionized water at 8 in Hg on
a vacuum manifold (PrepSep 12 port, Fisher scientific,PA).
Analytes were extracted using 60 mg/3mL Oasis HLB cartridges (Waters, Millford, MA). Cartridges were preconditioned with 3mL of MeOH, 3mL of 0.5N HCl, and 3mL of deionized water at 8 in Hg ona vacuum manifold (PrepSep 12 port, Fisher scientific,PA).
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