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1、INTERNATIONAL STANDARD IS0 11438-3 First edition 1993-l 2-01 Ferronickel - Determination of trace-element content by electrothermal atomic absorption spectrometric method - Part 3: Determination of antimony content Ferro-nickel - Dosage des m is the mass, in grams, of the test portion; F is the dilu
2、tion factor of 2,5. 8.2 Precision 8.2.1 Laboratory tests Seven laboratories in five countries participated in the testing of this procedure using two samples of nomi- nal composition given in table 1. Samples were analysed three times on different days. 8.2.2 Statistical analysis 8.2.2.1 Results fro
3、m the interlaboratory test pro- gramme were evaluated according to IS0 5725 as described in 8.2.2 of IS0 11438-1:1993. The results of this analysis are given in table2. 8.2.2.2 One laboratory was rejected as a Cochran outlier for sample 1. Another laboratory was rejected for the same sample because
4、of too high a detection limit. 9 Test repoi-t Refer to clause 10 of IS0 11438-1:1993. 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 21:06:25 MDTNo reproduction or networking
5、permitted without license from IHS -,-,- IS0 11438-3:1993(E) Table 1 - Nominal composition of test samples I I Sample 1 2 Content, g/t Pb Sb Sn Te TI Ag In Bi As Se Cd Ga 1 1 1 0,5 0,5 1 0,5 0,l 3 0,5 0,5 2 6 4 10 2 1 6 2 1 5 3 1 4 Ge Zn 1 2 4 5 Content, % (m/m) Ni Fe 25 Remainder 25 Remainder Table
6、 2 - Results of statistical analysis Sample 1 2 Mean wSb# sit 0,92 4,42 Within-laboratory standard deviation I 0,l 0,3 Between-laboratory standard deviation Repeatability 0,3 or9 Reproducibility 084 2,3 Copyright International Organization for Standardization Provided by IHS under license with ISO L
7、icensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 21:06:25 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 11438-3:1993(E) UDC 669.245:543.422.064:546.86 Descriptors: nickel alloys, iron nickel alloys, ferroalloys, ferronickel, chemical analysis,
8、determination of content, trace elements, antimony, atomic absorption spectrometric method. Price based on 3 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 21:06:25 MDTNo reproduction or networking permitted without license from IHS -,-,-