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See Chinese contents: GB/T 27985-2011 GB/T 27985-2011: Determination of tannin in feeds -- Spectrophotometry
This Standard specifies the spectrophotometry for the determination of tannin in feeds. This Standard applies to the determination of tannin content in compound feeds and single feeds. The detection-limit of this method is 17.5 mg/kg, and the linear range is 0.50 mg/L ~ 6.00 mg/L.
