NA 057
DIN Standards Committee Food and Agricultural Products
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ISO 6598
ISO 6598
Fertilizers; Determination of phosphorus content; Quinoline phosphomolybdate gravimetric method
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Düngemittel; Bestimmung des Phosphorgehaltes, gravimetrische Methode mittels Chinolinphosphormolybdat
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ISO/TC 134 - Fertilizers, soil conditioners and beneficial substances