1 x 581 ERA PT Minerals, WP One 500 mL whole-volume bottle is ready to analyze. Alkalinity as CaCO3 25-400 mg/L Chloride 35-275 mg/L Conductivity at 25°C 200-1200 µmhos/cm Fluoride 0.4-4 mg/L Potassium 4-40 mg/L Sodium 10-100 mg/L Sulfate 5-125 mg/L Total Dissolved Solids at 180°C 140-800 mg/L Total Solids at 105°C 140-800 mg/L 1 x 584 ERA PT Simple Nutrients, WP One 15 mL screw-cap vial yields up to 2 liters after dilution...

1 x 581 ERA PT Minerals, WP One 500 mL whole-volume bottle is ready to analyze. Alkalinity as CaCO3 25-400 mg/L Chloride 35-275 mg/L Conductivity at 25°C 200-1200 µmhos/cm Fluoride 0.4-4 mg/L Potassium 4-40 mg/L Sodium 10-100 mg/L Sulfate 5-125 mg/L Total Dissolved Solids at 180°C 140-800 mg/L Total Solids at 105°C 140-800 mg/L 1 x 584 ERA PT Simple Nutrients, WP One 15 mL screw-cap vial yields up to 2 liters after dilution. Ammonia as N 1-20 mg/L Nitrate + Nitrite as N 2.5-25 mg/L Nitrate as N 2-25 mg/L ortho-Phosphate as P 0.5-5.5 mg/L Total Nitrogen 3-45 mg/L 1 x 241 ERA PT Solids, WP One 500 mL whole-volume bottle is ready to analyze. The CRM is also certified for pH. For a pH PT, order Cat. #577. Total Suspended Solids 20-100 mg/L Total Dissolved Solids at 180°C 140-800 mg/L Total Solids at 105°C 140-800 mg/L 1 x 4120 ERA PT Oil & Grease Concentrate, WP One 23 mL screw-cap vial yields up to 2 liters after dilution. n-Hexane Extractable Material(O&G)(Grav) 20-200 mg/L WP 328: opens – May 16, closes - June 30

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