Prepared from Lake Ontario water, filtered, diluted and preserved with 0.2% nitric acidCertified valuesAl. 14.5 mg/LCu.4.6 mg/LSb . 1.9 mg/LAs. 2.4 mg/L.Fe.11.4 mg/LSe . 1.6 mg/LBa . 5.1 mg/LLi.3.9 mg/LSr . 54.2 mg/LBe . 1.4 mg/LMn .2.6 mg/LTl . 1.8 mg/LC