ISO 7627-4-1983 Hardmetals Chemical analysis by flame atomic absorption spectrometry Part 4 Determination of molybdenum titanium and vanadium in contents from 0.pdf

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1、Norme internationale 762714 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.ME)(LLYHAPOAHAR OPfAHM3AUIlR f-l0 CTAHAAPTM3AlJ4M.ORGANISATION INTERNATIONALE DE NORMALISATION Mtaux-durs - Analyse chimique par spectromtrie dabsorption atomique dans la flamme - Partie 4: Dosage du molybdne, du titane et du

2、 vanadium des teneurs comprises entre 0,Ol et 0,5 % (mlm) Hardmetals - Chemical analysis b y flame atomic absorption spectrometry - Part 4: Determination. of molybdenum, titanium and vanadium in contents from O,Ol to 0,5 % (mImI Premire Adition - 1983-10-15 G: Y F CDU 669.018.25 : 643.422 Rf.-no : I

3、SO 7627/4-1983 (F) Descripteurs : m l est Je 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

4、la moyenne arithmtique des dosages acceptables arrondie la valeur la plus proche indique au tableau 2. Tableau 2 - Arrondissage des rsultats Teneur Arrondissage B la valeur la plus proche % hlm) % hlm) de 0,OI 0,l 0,OI 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).

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