EPN, 100 µg/ml, Ethyl acetate, 1ml

Sulfur, 500µg/g (0.0500 wt%) in Diesel Fuel, 100ml

Malathion monocarboxylic acid, 100mg

Bis(2-ethylhexyl-d17) tetrabromo[13C6]phthalate, 1.2ml x 50ug/ml, toluene