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

CHEM 581: Experimental Chemistry

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September 24, 2014 Procedures Completing Film Synthesis from Last Week Warm 150mL of Sodium Sulfate Solution (see below for details) at 80C for 15 minutes Place film in Sodium Sulfate Solution (see below for details) at 80C for 1 hour with gentle stirring Warm 150mL of 1% HCl at 80C for 15 minutes Place film in 1% HCl Solution (see below for details) at 80C for 30 minutes with gentle stirring Place film in Sodium Bicarbonate Solution for 15 minutes at room temperature with gentle stirring Make 10% Exchanged Clay Films From our exchanged clay Add 7mL of water to 1.0028 g of 22,000MW polyvinyl alcohol and 0.1107 g of exchanged NaMT in a glass vial Stir the solution with constant heating at 75C until the polymer is dissolved and the clay is dispersed (~15 minutes) Cool the solution to room temperature Add 0.5mL 0.8 wt% glutaraldehyde. Stir for an additional 3 minutes to ensure homogeneity Pour solution into a teflon dish to dry until the next class From MJJ's group exchanged clay 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 Stir the solution with constant heating at 75C until the polymer is dissolved and the clay is dispersed (~15 minutes) Cool the solution to room temperature Add 0.5mL 0.8 wt% glutaraldehyde. Stir for an additional 3 minutes to ensure homogeneity Pour solution into a teflon dish to dry until the next class Atomic Absorption: Arsenic 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 Note: AA detector broken, this is will be continued at a later date Soaking Films in Rhodamine 6G Dye Film Solution Vial mass Vial + film mass Film mass PVA film 20 uM R6G 13.0803 g 13.1813 g 0.101 g 10 uM R6G 13.0713 g 13.1497 g 0.0784 g 1 uM R6G 13.0403 g 13.1337 g 0.0934 g PVA-Clay film 20 uM R6G 13.0828 g 13.2554 g 0.1726 g 10 uM R6G 12.9552 g 13.0732 g 0.118 g 1 uM R6G 13.0198 g 13.1377 g 0.1179 g Dilutions done by James and Eleni Each film soaked in 10 mL R6G solution