Parathion-methyl, 100 µg/ml, Toluene, 1ml

Ethanol standard in water,4.0g/L,water, 1.5mL

Mass-Labelled PCDD/PCDF Internal Standard Solution, 1.2ml, nonane

4-tert-Octylphenol-di-ethoxylate, 100 µg/ml, Acet