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International Journal of Analytical Chemistry
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International Journal of Analytical Chemistry
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2012
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Article
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Tab 16
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Research Article
Spectrophotometric Determination of Iron(II) and Cobalt(II) by Direct, Derivative, and Simultaneous Methods Using 2-Hydroxy-1-Naphthaldehyde-p-Hydroxybenzoichydrazone
Table 16
Determination of iron and cobalt in alloy samples.
Sample (composition)
Amount (%)
Relative error (%)
Certified
Found (
) ± SD
Fe(II)
Co(II)
Fe(II)
Co(II)
Fe(II)
Co(II)
Elgiloy-M
(20 Cr; 15 Ni; 0.15 C; 2 Mn; 7 Mo;.05 Be)
15
40
1.33
1.52
Rim alloy
(17 Mo; 3Mn)
68
12
1.88
0.66
Sofcomag 25
(Fe and Co)
75
25
1.48
3.92
Sofcomag 49
(Fe and Co)
51
49
2.18
0.36