Profenofos, 100 µg/ml, Toluene, 1ml

Succinic acid, 250mg

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

Tetraethyltin, 1000 µg/ml, Methanol, 5ml