Abstract
A direct amperometric titration of copper is described; o-( p-tolylsulfonamido) aniline serves as titrant. The optimum conditions are discussed and the method is applied to the analysis of copper in brass alloys. t001 IV. Analysis of various samples in which copper was determined (Values given as percentages) Constituents Thorn Smith # 30 Thorn Smith # 54 NBS # 37E NBS # 63C Cu present 59.30 84.04 69.61 80.48 Zn 37.81 1.452 27.85 0.093 Pb 0.1 8.590 1.00 9.35 Sn Trace 5.737 1.00 9.03 Sb 0.52 Ni Trace 0.53 0.32 P 0.145 S 0.060 As 0.023 Fe 1.22 0.004 0.0013 Al 1.15 Mn 0.35 Cu found 59.09 83.64 69.68 a 80.54 a aAverage of 3 determinations.
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