User:Melissa Novy/Notebook/CHEM-581/2012/09/28

Objectives

• Dilute modified and unmodified (Na-MT)-CuSO₄ filtrate solutions for ion chromatography, ion selective electrode, and atomic absorption analysis.
• Conduct ion selective electrode analysis on the solutions.

(Na-MT)-CuSO₄ Filtrate Dilutions

• Calculations:
  • Assume 1.25 g CuSO₄ was used to make a ? ppm CuSO₄ solution.

• Dilutions of 7.4 and 10 ppm were made for each of the 100% CEC (Na-MT)-CuSO₄, 50% CEC (Na-MT)-CuSO₄, and (Na-MT)-CuSO₄ filtrates for a total of 18 solutions.
  • Please refer to the entry on 2012/09/26 for how the solutions were prepared and filtered.

Ion Selective Electrode Analysis

• Protocol:
  1. Plug the correct electrode into the SympHony meter.
  2. Turn the meter on, then press the up/down arrows until ISE and mV appear on the screen.
  3. Remove the electrode from its storage solution, rinse it with distilled water, then dry it with KimWipes.
  4. Place the electrode directly into the solution to be analyzed. Alternatively, the solution can be poured into a small vial, into which the electrode can also be placed.
  5. Let the solution and electrode equilibrate for a set period of time (between 2-5 minutes for the purposes of the following experiment), then press measure.
  6. Once the measurement is finalized, record the value that appears on the screen.

• Standards of 1 ppm, 2 ppm, 5 ppm, 10 ppm, and 15 ppm Cu⁺² were analyzed to create a calibration curve.
• The filtrate solutions will be analyzed next week.