Nitrate (NO3-) as N, 1000µg/mL in Water, 100ml

Sulfate (SO4-2), 1000µg/ml in Water, 500ml

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

ICP Mix 15, 1000µg/mL in 2% HNO3, 100ml