User:Douglas M. Fox/Notebook/AU CHEM-581 F2012 Lab Support/2012/08/28

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Solutions for use with IC and/or AA

Obtained fresh DI water (16.6 MΩ) for use in all solutions

  1. 1 L 20 ppm SO42- as CuSO4
    • Rinsed flask with conc. HCl (20 mL for 10 min, swirling & tilting)
    • (Note: Chromic acid cleans glass best, but toxicity limits use)
    • Rinsed copiously with DI water
    • Dried in oven 90 min at 110°C
    • Used CuSO4·5H2O as received
    • Cooled flask 20 min to room temperature
    • 0.05217 g CuSO4·5H2O (20.06 ppm SO42-, 13.24 ppm Cu2+)