Interference Chk Std 6020 Sol B in 2% HNO3, (µg/mL) Silver at 5, Arsenic, Cadmium, Selenium, Zinc at 10, Chromium, Cobalt, Copper, Manganese, Nickel, Vanadium at 20 in 2% HNO3. 12 months expiry date. Traceable to NIST 31XX series. ISO 9001:2015 certified
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