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MULTI ION IC STANDARD - 6 COMPONENTS (Lithium (Li+) 0.5 mg/L; Sodium (Na+)2 mg/L; Ammonium (NH4+) 2.5 mg/L; Potassium (K+) 5 mg/L; Magnesium (Mg2+) 2.5 mg/L; Calcium (Ca2+) 5 mg/L in 0.1% Nitric Acid) - traceable to NIST — LOBA Chemie F0057 | Valence Scientific