Alachlor ESA, 1000µg/ml in MeOH, 1ml

Caffeine, 1000µg/ml in MeOH, 1ml

1,2,3,7,8-Pentachlorodibenzo-p-dioxin,50 µg/mL,n-nonane,1mL,

Ba, 1000 µg/mL in 2% HNO3, 100ml