Multielement cal std 8 in 2% HNO3 (µg)mL) Strontium at 10, Chromium, Nickel at 20, Lithium at 100, Aluminium, Sodium at 200, Potassium at 400, Calcium at 1,000 in 2% HNO3. 12 months expiry date. Traceable to NIST 31XX series. ISO 9001:2015 certified, ISO
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