Chlorothalonil-4-hydroxy, 10.0 µg/ml, Acetonitril

2,3,4,6,9-Pentachlorodibenzofuran (or 1,4,6,7,8), 1.2ml x 50ug/ml, nonane

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

N-Nitroso-L-proline, 10mg