Metal Finishing Guide Book

2012-2013

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505 2.65 �� 0.038 2.72 �� 0.026 �������� g/l 0.046 0.032 Sr 4.8 Added, mg 0.018 9.85 4.73 4.85 Determined, mg Synthetic solution : HEEF - 25R +1N H2SO4(248 g/l CrO3 + 2.7 g/l SO4) Table 1. Comparison and reproducible results of the determination of sulfates in chromium plating solution. 9.6 2.86 �� 0.015 4 ml + 2 ml 0.05 4.8 8 4 ml Bath 18 0.13 0.09 R=Xmax - Xmin, g/l 4 ml + 1 ml 8 4 ml 8 n Bath 17 4 ml + 1 ml Aliquiot + 0.1N H2SO4 4 ml Aliquiot, ml Synthetic chromium solution* Sample Volumetric EDTA methd, g/l 2.92 2.81 Gravimetric method, g/l

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