ISO 7627-3-1983 Hardmetals Chemical analysis by flame atomic absorption spectrometry Part 3 Determination of cobalt iron manganese and nickel in contents from 0.pdf

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1、Norme internationale 762713 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEX)(AYHAPOliAFl OPfAHkl3Al4R Il0 CTAHAPTkl3ALWl.ORGANISATlON INTERNATIONALE DE NORMALISATION Mtaux-durs - Analyse chimique par spectromtrie dabsorption atomique dans la flamme - Partie 3: Dosage du cobalt, du fer, du mangans

2、e et du nickel des teneurs comprises entre 0,Ol et 0,5 % (mlm) Hardmetals - Chemical analysis b y flame atomic absorption spectrometry - Part 3: Determination of cobalt, iron, manganese and nickel in contents from 0,Olto 0,5 YO hhnl Premire dition - 1983-10-15 CDU 669.018.25 : 643.422 Rf. no : ISO 7

3、627/3-1983 (FI Descripteurs : m v est le volume de dilution, en millilitres; m est la masse, en grammes, de la prise dessai. 5.2 Tolrances admissibles .Lcart entre trois dosages indpendants ne doit pas dpasser 0,2 fois la teneur en pourcents de llment (valeur absolue). 5.3 Rsultat final Indiquer la

4、moyenne arithmtique des dosages acceptables arrondie la valeur la plus proche indique au tableau 2. Tableau 2 - Arrondissage des rsultats l Teneur Arrondissage la valeur la plus proche % bnlm) % bnlm) de 0,Ol 0,l 0,Ol plus de 0,l 0,5 0,05 Si la teneur en llment considr est infrieure 0,Ol % (mlm), indiquer simplement moins de 0,Ol % (mlm). 2

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