Solution A of Calibration Std 1 in 4% HNO3, (µg/mL) Beryllium at 50, Chromium at 200, Copper at 250, Cobalt, Manganese, Nickel, Vanadium, Zinc at 500, Iron at 1,000, Aluminium, Barium at 2,000, Calcium, Potassium, Magnesium, Sodium at 5,000 4% HNO3. 12 m
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