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Table 9 Results of an 'accuracy check' of the proposed method with standard reference material: IPT 61 Glass Sand

From: Stepwise complexometric determination of aluminium, titanium and iron concentrations in silica sand and allied materials

Constituents

Certified Reference Results

Set-I, % w/w, Results obtained using the proposed method

Set-II, % w/w Results obtained by complexometry5 for Al, and colorimetry6 for Fe and Ti

Al2O3

0.054

0.048 ± 0.005

0.05 ± 0.004

Fe2O3

0.014

0.016 ± 0.003

0.021 ± 0.004

TiO2

0.026

0.030 ± 0.004

0.034 ± 0.003