Method 200.8/1638/1640 Internal Standard

Benzotriazole, 1000µg/ml in MeOH, 1ml

Paraoxon-methyl, 100µg/mL, Solvent-C.hexane, Unit 1mL, # of units-1, Cas.no. 950-35-6

Ethanol standard in water,0.1g/L,water, 3mL