User:Madeleine Y. Bee/Notebook/CHEM-581 Experimental Chemistry/2014/09/24: Difference between revisions

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*Construct calibration curve
*Construct calibration curve
====Soaking Films in Lead====
{| {{table}}
| align="center" style="background:#f0f0f0;"|'''Film'''
| align="center" style="background:#f0f0f0;"|'''Solution'''
| align="center" style="background:#f0f0f0;"|'''Vial mass'''
| align="center" style="background:#f0f0f0;"|'''Vial + film mass'''
| align="center" style="background:#f0f0f0;"|'''Film mass'''
|-
| PVA film|| 50 ppm Pb|| 13.0803 g|| 13.1813 g|| g
|-
| || 100 ppm Pb|| 13.0713 g|| 13.1497 g|| g
|-
| || 150 ppm Pb||13.0403 g|| 13.1337 g|| g
|-
| PVA-Clay film|| 150 ppm Pb|| 13.0828 g|| 13.2554 g|| g
|-
| || 100 ppm Pb|| 12.9552 g|| 13.0732 g|| g
|-
| || 50 ppm Pb|| 13.0198 g|| 13.1377 g|| g
|}




Revision as of 07:00, 24 September 2014

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September 24, 2014

Procedures

Completing Film Synthesis from Last Week

  1. Warm 150mL of Sodium Sulfate Solution (see below for details) at 80C for 15 minutes
  2. Place film in Sodium Sulfate Solution (see below for details) at 80C for 1 hour with gentle stirring
  3. Warm 150mL of 1% HCl at 80C for 15 minutes
  4. Place film in 1% HCl Solution (see below for details) at 80C for 30 minutes with gentle stirring
  5. Place film in Sodium Bicarbonate Solution for 15 minutes at room temperature with gentle stirring

Make 10% Exchanged Clay Films

  • From our exchanged clay
    1. Add 7mL of water to 1.0028 g of 22,000MW polyvinyl alcohol and 0.1107 g of exchanged NaMT in a glass vial
    2. Stir the solution with constant heating at 75C until the polymer is dissolved and the clay is dispersed (~15 minutes)
    3. Cool the solution to room temperature
    4. Add 0.5mL 0.8 wt% glutaraldehyde.
    5. Stir for an additional 3 minutes to ensure homogeneity
    6. Pour solution into a teflon dish to dry until the next class
  • From MJJ's group exchanged clay
    1. Add 7mL of water to 1.0042 g of 22,000MW polyvinyl alcohol and 0.1101 g of exchanged NaMT (same ion as our group) in a glass vial
    2. Stir the solution with constant heating at 75C until the polymer is dissolved and the clay is dispersed (~15 minutes)
    3. Cool the solution to room temperature
    4. Add 0.5mL 0.8 wt% glutaraldehyde.
    5. Stir for an additional 3 minutes to ensure homogeneity
    6. Pour solution into a teflon dish to dry until the next class

Atomic Absorption: As Solutions

  • Standard solutions:
    • 0ppm
    • 10ppm
    • 20ppm
    • 30ppm
    • 40ppm
    • 50 ppm
    • Note: all standard solutions made by James and Eleni
  • Sample dilutions (up to 10mL):
    • 150 ppm solutions
    • 5x dilution (~30 ppm): (1x)(V)=(1/5x)(10mL)
      • 2 mL in 10 mL
    • 100 ppm solutions
    • 4x dilution (~20 ppm): (1x)(V)=(1/4x)(10mL)
      • 2.5 mL in 10 mL
    • 50 ppm solutions
    • No dilution
  • Construct calibration curve

Soaking Films in Lead

Film Solution Vial mass Vial + film mass Film mass
PVA film 50 ppm Pb 13.0803 g 13.1813 g g
100 ppm Pb 13.0713 g 13.1497 g g
150 ppm Pb 13.0403 g 13.1337 g g
PVA-Clay film 150 ppm Pb 13.0828 g 13.2554 g g
100 ppm Pb 12.9552 g 13.0732 g g
50 ppm Pb 13.0198 g 13.1377 g g



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