Phosphate (PO4-3) as P, 1000µg/ml in Water, 500ml

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

S @ 1000 µg/g (0.100 wt%) in #2 Diesel Fuel, 100ml

Method 200.8/1638/1640 Internal Standard, 10µg/ml in 2%-HNO3, 4x25ml