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Table 8 Results of an 'accuracy check' of the proposed method with standard reference material: NIST SRM 89 Lead Barium Glass

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 0.18 0.18 ± 0.03 0.054 ± 0.05
Fe2O3 0.049 0.036 ± 0.004 0.044 ± 0.005
TiO2 0.01 0.024 ± 0.006 0.026 ± 0.006