NF U42-202

Fertilizers, ground natural mineral phosphates. Extraction of phosphoric anhydride soluble in formic acid reagent.

Cette norme définit pour les phosphates minéraux naturels une méthode d'extraction de l'anhydride phosphorique soluble dans une solution d'acide formique, dont la mention de la teneur est obligatoire pour certaines dénominations types définies dans les normes de spécifications. Elle est donc à l'usage des producteurs et des organismes officiels de contrôle.

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