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See Chinese contents: NY/T 1975-2010 NY/T 1975-2010: Water-soluble fertilizers. Determination of amino-acids content
This standard specifies the automatic amino acid analyzer method and precolumn derivatization-liquid chromatography method for the determination of free amino acids in water-soluble fertilizers. This standard applies to the determination of free amino acid content in liquid or solid water-soluble fertilizers.
