User:Michael S. Bible/Notebook/581/2014/09/10: Difference between revisions
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==Description== | |||
We are going to exchange the sodium in the sodium montmorillonite for an organic cation. The procedures are taken from these two sources ([http://www.scirp.org/journal/PaperInformation.aspx?PaperID=17245#.VA5V9Et5_zY 1], [http://www.clays.org/journal/archive/volume%2010/10-1-153.pdf 2] along with Karlena Brown's thesis. We are working from the starting point that there are 92 miliequivalents (meq) of Na+ per 100g of montmorillonite. | |||
# Add 1.1014g of Sodium Montmorillonite (NaMT) to a scintillation vial containing 20mL of 50:50 HPLC grade water:ethanol. | |||
# Determine the amount of cation to add if using either [http://www.sigmaaldrich.com/catalog/product/aldrich/276200?lang=en®ion=US tributylhexadecylphosphonium bromide] or [https://us.vwr.com/store/catalog/product.jsp?product_id=7491057 (1-hexadecyl)triphenylphosphonium bromide] to exchange 100% of the Na from the clay. | |||
# Add this amount of phosphonium ion to the clay solution. | |||
# Cap the vial | |||
# Stir for 1 week. | |||
# Vacuum filter using 0.2uM nylon filter paper | |||
# Dry in oven at 90C overnight | |||
# Grind with a mortar and pestle. | |||
# Store in a dessicator | |||
Revision as of 05:46, 24 September 2014
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DescriptionWe are going to exchange the sodium in the sodium montmorillonite for an organic cation. The procedures are taken from these two sources (1, 2 along with Karlena Brown's thesis. We are working from the starting point that there are 92 miliequivalents (meq) of Na+ per 100g of montmorillonite.
Exchange of Sodium in Sodium Montmorillonite for an Organic CationToday we began the exchange of sodium in Sodium Montmorillonite (NaMT) for an organic cation. We worked with the assumption that there are 92 milliequivalents (meq) of Na+ per 100g of NaMT.
CalculationsWe wanted to exchange 100% of the Na+ from the clay so we needed to add an equivalent number of moles of tributylhexadecylphosphonium bromide to our NaMT.
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