Multielement cal std 3 in 5% HCl, (µg/mL) Chromium at 20, Molybdenum at 100, Aluminium, Antimony, Sodium at 200, Potassium at 400 in 5% HCl. 12 months expiry date. Traceable to NIST 31XX series. ISO 9001:2015 certified, ISO/IEC 17025:2017 and ISO 17034:2
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