Total Residual Free Chlorine (Cl)

Ethanol standard in serum,0.1g/L,serum, 1.5mL

Fenitrothion-d6 (O,O-dimethyl-d6), 100µg/ml in Acetone, 1ml

Ethylene thiourea, 100 µg/ml, Acetonitrile, 1ml