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Table 1 Various evaluated components for the determination of Lead

From: Evaluation of purity with its uncertainty value in high purity lead stick by conventional and electro-gravimetric methods

Sample I.D. Precipitate obtained as PbO2or PbSO4,(WPb),(g) Weight of sample taken for analysis, Wsamp,(g) Concentration of lead found by electro-gravimetry and gravimetry (mgkg-1), ( C(M Pb ) Exp ) Average concentration of lead found by electro-gravimetry and gravimetry, C Pb (mg kg-1) Theoretical Concentration of stock solution (mg kg-1) ( C(M Pb ) Theo ) Percent of lead analyzed by electro-gravimetry and gravimetry ( C(M Pb ) Exp )/ C(M Pb ) Theo ) Average (g/100 g) of lead analyzed by electro-gravimetry and gravimetry
Pb-1 0.0584* 50.5550* 1000.641* 1000.813 100 1.1253 99.952* 99.969
Pb-2 0.0585* 50.6247* 1000.974* 99.985*
Pb-3 0.0585* 50.6285* 1000.899* 99.977*
Pb-4 0.0585* 50.6285* 1000.899* 99.977*
Pb-5 0.0582* 50.3812* 1000.654* 99.953*
Pb-6 0.0741** 50.5765** 1001.100** 1000.883 99.988** 99.976
Pb-7 0.0741** 50.5798** 1000.896** 99.977**
Pb-7 0.0741** 50.5885** 1000.936** 99.981**
Pb-9 0.0741** 50.5885** 1000.764** 99.964**
Pb-10 0.0740** 50.5175** 1000.818**    99.969**  
  1. * Value obtained by electro-gravimetry; ** Value obtained by conventional gravimetry.