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Table 2 Determination of aluminium, lead and zinc in multicomponent glass reference material NBS 1412.

From: Selective masking and demasking for the stepwise complexometric determination of aluminium, lead and zinc from the same solution

Sample

Constituents

Certified values of NBS 1412

Results obtained by proposed method

Result obtained by the standard method10

1.

Al2O3%

7.52

7.54 ± 0.11

7.59 ± 0.13

2.

PbO %

4.40

4.42 ± 0.08

4.38 ± 0.09

3.

ZnO %

4.48

4.47 ± 0.08

4.42 ± 0.09