Dichlorvos, 10.0 µg/ml, Acetonitrile, 10ml

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

D(-​)​-​Isoascorbic Acid (Erythorbic Acid), 10g

4,4'-DDD, 100 µg/ml, Ethyl acetate, 5ml