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See Chinese contents: GB/T 13088-2006 GB/T 13088-2006: Determination of chromium in feeds
This Standard specifies two methods for the determination of chromium content in feed by atomic absorption spectrometer and spectrophotometer. Method 1 of this Standard is atomic absorption spectrometry. It is applicable to feed raw materials (including leather powder for feed, hydrolyzed leather powder), trace element premixes, compound premixes, concentrates and compound feeds. The minimum detection limit of graphite furnace atomic absorption spectrometry is 0.005 ¦Ìg/kg. The minimum detection limit of flame atomic absorption spectrometry is 150 ¦Ìg/kg. Method 2 of this Standard is spectrophotometric method. It is applicable to the determination of chromium in feed raw materials (including hydrolyzed leather powder) and compound feed.
