Skip to main content

Table 4 Summary table for Uncertainty Budget for purity determination in (g/100g) by electro-gravimetry

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

Sources X u std (x) u std (x) / X Uc(%) U Ex (%); k=2
Precision (P) 99.969% 0.0069% 0.00007 0.134 0.268
Atomic mass of PbO2; (At. Wt) 239.199 g 0.0577 g 0.000241
Balance (Mettler 220 g); (W metal ) 2.015 g 0.00005 g 0.000025
Balance (Sartorious 41kg) (W Obs. stock solution ) 2012.734 g 0.1345 g 0.000067
Error buoyancy; (Bu w.r.t Wtrue mass stock soln.) 2014.745 g 2.0012 g 0.000993
weight of PbO2 (Mettler 220 g) (W ppt ) 0.0584 g 0.00005 g 0.000856
Weight of soln. for deposition(Mettler 220 g) (W aliquote ) 50.5618 g 0.00005 g 0.000001