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A Comparison Of Cationic Surfactant Immobilized Ion Exchange Membranes In Their Application For Use In Extraction Of 4-Nitophenol, Robert Derrek Brown
A Comparison Of Cationic Surfactant Immobilized Ion Exchange Membranes In Their Application For Use In Extraction Of 4-Nitophenol, Robert Derrek Brown
Dr Robert Brown
Solid Phase Extraction has replaced distillation and liquid-liquid extraction as the most widely used method for extraction from solution. Though traditional SPE has seen great success, its downfalls are that it requires meticulous preparation procedures requiring funtionalized silanes and silica or polymerization courses. An alternative is ion exchange membranes to which long carbon chain ionic surfactants have been attached. The S1000 membrane ion exchange capacity was measured to be approximately 110 micro-equil/disc while the P81 membrane was 150 micro-equil/disc. Octadecyltri-methylammonium surfactant was immobilized on the membrane surface, qualitated through the use of ATR-FTIR, and quantified through elemental analysis. Kinetic adsorption …
Aging Of A Thermoelectric Module: Visualization Of Elemental Analysis, Stacie M. Dahl, Bernice E. Mills
Aging Of A Thermoelectric Module: Visualization Of Elemental Analysis, Stacie M. Dahl, Bernice E. Mills
Stacie M Dahl
Visualization of elemental composition is done to compare the surfaces of an aged thermoelectric module (TM) to an unaged one. The two modules’ exteriors are also compared to their interiors. Highlights of the analysis are presented here.