Certified Waste Water Nutrient, Solution B. 10 mL. Contains: (µg/mL) Nitrogen from NH4Cl at 15, Nitrogen from NaNO2 + NaNO3 at 15, Phosphorus from Na2HPO4 at 5 in H2O. 12 months expiry date. Traceable to NIST SRM 31XX series. ISO 9001:2015 certified, ISO/IEC 17025:2017 and ISO 17034:20166 accredited.
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