Mesosulfuron-methyl, 100 µg/ml, Acetonitrile, 5m

Potassium (K)

EPA Method 537 Native Primary Std (br/l mix), 2µg/ml in MeOH, 1,2ml

2,2',3,6'-Tetrachlorobiphenyl,100 µg/mL,isooctane,1mL,