7 days Ambient 7 days Refrigerated 7 days Frozen
Peak: 20.0 - 30.0 ug/mL Trough: 4.0 - 8.0 ug/mL Potentially Toxic Ranges: Peak: > = 40.0 ug/mL Trough: > = 15.0 ug/mL Detection Limit 2.5 mg/L