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Hach Company Ammonium p-Toluenesulfonic Acid, 25 g
Supplier: Hach Company 2277924
(Ammonium-PTSA) Protein-TKN standard: 7.402% N, 46.26% crude protein. For checking accuracy and digestion recovery in Total Nitrogen and TKN determinations. 25 g bottle. See 2277800 for the complete set of three standards with increasing resistance to digestion.
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