Pirimiphos-ethyl, 100 µg/ml, Ethyl acetate, 5ml

Hexavalent Chromium (Cr +6)

4-Chloronitrobenzene, 100 µg/ml, Methanol, 1ml

2,4-Dichlorobenzyl chloride,1000 µg/mL,isooctane,1mL,