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See Chinese contents: GB/T 18633-2018 GB/T 18633-2018: Determination of potassium in feeds -- Flame photometry
This Standard specifies using flame photometry to determine the potassium in the feeds. This Standard is applicable to determine the potassium in the feed ingredients, formula feed, concentrated feed, concentrate supplement, and additive premix. This Standard method detection limit is 2.00mg/kg; quantitative limit is 200mg/kg.
