Potassium butylxanthate (as butylxanthate acid)

9377-2 Quality Control Standard of Mineral Oils A+B , 10000µg/mL in acetone (5000µg/mL of each), 10x1ml

Fenamiphos-sulfone, 100 µg/ml, Acetonitrile, 1ml

Phosphate as (PO4-3), 1000µg/ml in water, 100ml