EPA Method 8270C - B/N Matrix Spiking Solution

d-Norpropoxyphene maleate,100 µg/mL,base aceton,1mL

n-Butyl acetate, 1000µg/ml in MeOH, 1ml

2,2',4,4'-Tetrabromo[13C12]diphenyl ether, 1.2ml x 50ug/ml, nonane