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Chromatograms: Metrosep A Supp 4 – 250

Regeneration: Contamination by low-valency hydrophilic ions:a)Rinse with ultrapure water (15 min at 0.5 mL/min)b)Rinse with 10-fold concentrated eluent (60 min at 0.5 mL/min) c)Rinse with ultrapure water (15 min at 0.5 mL/min) d)Rinse with eluent (60 min at 0.5 mL/min)Contamination by high-valency hydrophilic ions:a)Rinse with ultrapure water (15 min at 0.5 mL/min) b)Rinse with 5% acetonitrile (10 min at 0.5 mL/min)c)Rinse with 100% acetonitrile (60 min at 0.5 mL/min)d)Rinse with 50% acetonitrile (10 min at 0.5 mL/min) e)Rinse with ultrapure water (30 min at 0.5 mL/min) f)Rinse with eluent (60 min at 0.5 mL/min)Storage:In the eluent

Phthalic acid eluent, standard 1Chloride25.0 mg/L 2Nitrite25.0 mg/L 3Bromide25.0 mg/L 4Nitrate25.0 mg/L5Sulfate25.0 mg/L Carbonate eluent, standard1Fluoride5.00 mg/L2Chloride5.00 mg/L 3Nitrite5.00 mg/L 4Bromide10.00 mg/LCarbonate eluent, drinking water1Fluoride0.04 mg/L2Chloride5.25 mg/L 3Nitrate10.36 mg/L4System peak-5Sulfate6.90 mg/L5Nitrate10.00 mg/L6Phosphate10.00 mg/L 7Sulfate10.00 mg/L Carbonate eluent, mod. 1, standard, flow rate 2.5 mL/min1Injection peak-2Fluoride1.00 mg/L 3Chloride2.00 mg/L 4Nitrite5.00 mg/LCarbonate eluent, mod. 2, mineral water1Fluoride0.685mg/L2Chloride17.43mg/L3Nitrite0.037mg/L4Bromide0.181mg/L5Nitrate0.267mg/L6Sulfate121.0mg/L7Iodide0.034mg/L5Bromide10.00 mg/L6Nitrate10.00 mg/L 7Phosphate10.00 mg/L 8Sulfate10.00 mg/L

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