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

Dimethenamid OA, 100µg/ml in MeOH, 1ml

ISO 15753 Alternatively: Standard solution of 16 EPA-PAHs may be used, but this mixture also contain acenaphtylene S-4470-100-T EPA (=S-4063-100-T) 100µg each/mL in toluene; unit: 1x1mL

Citric acid [0.1% wt]