Silica (SiO2), 1000µg/ml in Water/0.5% NaOH, 100ml

Dimethoate, 100 µg/ml, Toluene, 1ml

2,3,3',4,5,5',6-Heptachlorobiphenyl ,100 µg/mL,isooctane,1mL,

Ciprofloxacin hydrochloride