Quality control standard inorganics for drinking water, 500 mL

Inorganics Quality Control Standard for Drinking Water. Ready to use. No dilution required. Mixed standard includes: Fluoride: 1 mg/L F⁻ , Nitrate: 2 mg/L NO₃⁻-N, Phosphate: 2 mg/L PO₄³⁻, Sulfate: 50 mg/L SO₄²⁻. 500 mL Bottle.