ISO 317-1984 Manganese ores and concentrates Determination of arsenic content Spectrometric method《锰矿石和锰精矿 砷含量的测定 光谱法》.pdf

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1、Norme internationale 1 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEt(YHAPOHAR OPrAHM3AllR l-IO CTAHAPTM3AWl.ORGANISATlON INTERNATIONALE DE NORMALISATION Minerais et concentrbs de manganese - Dosage de larsenic - Mbthode spectrom m. est la masse, en grammes, de la prise dessai corres- pondant a

2、la solution dessai ou a la partie aliquote; ml est la masse, en milligrammes, darsenic dans la solu- tion etalon de comparaison; K est la facteur de conversion pour Iexpression de la teneur a set en arsenic. 9.2 Tokrances admissibles sur les r&ultats des dosages en parall&le Tableau 2 Valeurs en pou

3、rcentage en masse Teneur en arsenic 0,001 B 0,002 5 0,002 5 8 0,005 0,005 3 0,Ol 0,Ol a 0,02 0,02 A 0,05 0,05 8 0,lO OJO A 0,20 Tokrance admissible Trois dosages Deux dosages en parall&le en parall&le 0,001 5 0,001 0,002 5 0,002 0,004 0,003 0,006 0,005 0,008 0,007 0,015 0,Ol 0,025 0,02 4 Page blanche Page blanche

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