User:Mary Mendoza/Notebook/CHEM 581: Experimental Chemistry I/2014/09/24

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Measurements with AAS Runs for arsenic and mercury samples are temporarily postponed due to technical issues such as defects with the detector and burnt out arsenic lamp. Lead (II) acetate · 3 H2O was cancelled as well. Films with Exchanged Clay 0.11163 g of tributylhexadecylphosphonium phosphonium bromide (our exchanged clay) was added to 1.00888 g of PVA 0.11024 g of (1-hexadecyl)triphenylphosphonium bromide (BEM's exchanged clay) was added to 1.00123 g of PVA These mixtures were stirred and heated. It was observed that the exchanged clay would not completely dissolve into solution. At the end of the lab, 0.5 mL of 0.8 wt% glutaraldehyde was added. The mixtures were stirred at room temperature and then cast into teflon dishes. Suspension of Films in Rhodamine 6G The arsenic, mercury, and lead were replaced with rhodamine 6G. Stock dilutions of 159 μM rhodamine 6G into 1, 10, and 20 μM were prepared by James, Michael, and Eleni. The table for the masses of the films and vial are posted on Jacob Esenther's page. The following calculations for the dilution of rhodamine 6G are as follows, taken from Michael Bible's entry: Preparation of solutions The three concentrations of R6G were created from a stock solution of 159 μM R6G. 1μM R6G - 0.629 mL of stock into 100mL - prepared by Eleni 10μM R6G - 6.289 mL of stock into 100mL - prepared by Michael 20μM R6G - 12.578mL of stock into 100mL - prepared by James Calculations V1*C1 = V2C2 V1 = V2C2/C1 Vstock = (100 mL)(1μM)/159μM) = 0.629 mL Vstock = (100 mL)(10μM)/159μM) = 6.289 mL Vstock = (100 mL)(20μM)/159μM) = 12.578 mL