EPA Method 551.1 Performance Check Soln

2,4-D-d3, 100μg/ml in Acetonitrile, 1ml

1,2,3,4,6,7-Hexachloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene

Monobutyl phthalate (mBP), 100µg/mL in AcCN,1ml