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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