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

Table 1 Various evaluated components for the determination of Lead

Sample I.D.	Precipitate obtained as PbO₂or PbSO_4,(W_Pb),(g)	Weight of sample taken for analysis, W_samp,(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**

* Value obtained by electro-gravimetry; ** Value obtained by conventional gravimetry.

ISSN: 2661-801X