Disulfoton, 100 µg/ml, Toluene, 1ml

ISO 9377-2MOD Extraction Solvent Stock Solution I 20ul of n-Heptane and 20mg of n-Tetracontane solved in 1000ml n-Pentane

Picloram, 1000µg/ml in Acetone, 1ml

Semi-Volatile Standard