{"id":{"repo_id":"mo-state","oai_identifier":"oai:bearworks.missouristate.edu:theses-1445"},"canonical_url":"https://search.dev.ndltd.org/etd/mo-state/oai:bearworks.missouristate.edu:theses-1445","repository":{"repo_id":"mo-state","name":"Missouri State University","base_url":"https://bearworks.missouristate.edu/do/oai/"},"display":{"title":"The Measurement of an Environmentally Important Surfactant System Using Electrochemiluminescence","abstract":"Direct incorporation of fatty-amine ethoxylate surfactants (trade names Ethomeen T/15 and Ethomeen T/25) into an electrochemiluminescence (ECL) reaction sequence is reported. A linear relationship between ECL intensity and concentration of surfactants exist using Ru(bpy)₃²⁺ (bpy = 2,2'-bipyridine) as the light emitting molecule. Detection limits of 0.7ppm (mg/L) and 0.9ppm have been observed for Ethomeen T/15 in aqueous buffer and seawater, respectively. Detection limits of 1.1 ppm have been achieved for Ethomeen T/25. ECL intensity vs. electrochemical potential profiles show that emission occurs at potentials corresponding to oxidation of both Ethomeen and Ru(bpy)₃²⁺. The ECL emission is also pH dependent, with maximum intensities observed at pH 6-8. These results parallel those observed when tri-n-propylamine is substituted for EthomeenT/15 or T/25 and indicate a possible mechanism for ECL generation.","abstract_html":"Direct incorporation of fatty-amine ethoxylate surfactants (trade names Ethomeen T/15 and Ethomeen T/25) into an electrochemiluminescence (ECL) reaction sequence is reported. A linear relationship between ECL intensity and concentration of surfactants exist using Ru(bpy)₃²⁺ (bpy = 2,2'-bipyridine) as the light emitting molecule. Detection limits of 0.7ppm (mg/L) and 0.9ppm have been observed for Ethomeen T/15 in aqueous buffer and seawater, respectively. Detection limits of 1.1 ppm have been achieved for Ethomeen T/25. ECL intensity vs. electrochemical potential profiles show that emission occurs at potentials corresponding to oxidation of both Ethomeen and Ru(bpy)₃²⁺. The ECL emission is also pH dependent, with maximum intensities observed at pH 6-8. These results parallel those observed when tri-n-propylamine is substituted for EthomeenT/15 or T/25 and indicate a possible mechanism for ECL generation.","abstract_has_math":false,"creators":["Alexander, Craig Joseph"],"institution":null,"degree_name":"Master of Science in Chemistry","degree_level":"Masters","degree_discipline":"Chemistry and Biochemistry","degree_department":null,"school":null,"contributors":["Mark Richter"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1999,"date_issued":"1999-07-01T07:00:00Z","date_published":"1999-07-01T07:00:00Z","updated_at":"2026-07-24T03:15:29Z","subjects":["Chemistry"],"languages":[],"rights":["© Craig Joseph Alexander"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://bearworks.missouristate.edu/theses/444","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Mark Richter"]},{"key":"dc:creator","label":"Author","values":["Alexander, Craig Joseph"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemistry and Biochemistry"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science in Chemistry"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Chemistry"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["© Craig Joseph Alexander"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://bearworks.missouristate.edu/theses/444"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Direct incorporation of fatty-amine ethoxylate surfactants (trade names Ethomeen T/15 and Ethomeen T/25) into an electrochemiluminescence (ECL) reaction sequence is reported. A linear relationship between ECL intensity and concentration of surfactants exist using Ru(bpy)₃²⁺ (bpy = 2,2'-bipyridine) as the light emitting molecule. Detection limits of 0.7ppm (mg/L) and 0.9ppm have been observed for Ethomeen T/15 in aqueous buffer and seawater, respectively. Detection limits of 1.1 ppm have been achieved for Ethomeen T/25. ECL intensity vs. electrochemical potential profiles show that emission occurs at potentials corresponding to oxidation of both Ethomeen and Ru(bpy)₃²⁺. The ECL emission is also pH dependent, with maximum intensities observed at pH 6-8. These results parallel those observed when tri-n-propylamine is substituted for EthomeenT/15 or T/25 and indicate a possible mechanism for ECL generation."]},{"key":"dc:title","label":"Title","values":["The Measurement of an Environmentally Important Surfactant System Using Electrochemiluminescence"]}]}],"canonical_facts":{"dc:contributor":["Mark Richter"],"dc:creator":["Alexander, Craig Joseph"],"dc:description.abstract":["Direct incorporation of fatty-amine ethoxylate surfactants (trade names Ethomeen T/15 and Ethomeen T/25) into an electrochemiluminescence (ECL) reaction sequence is reported. A linear relationship between ECL intensity and concentration of surfactants exist using Ru(bpy)₃²⁺ (bpy = 2,2'-bipyridine) as the light emitting molecule. Detection limits of 0.7ppm (mg/L) and 0.9ppm have been observed for Ethomeen T/15 in aqueous buffer and seawater, respectively. Detection limits of 1.1 ppm have been achieved for Ethomeen T/25. ECL intensity vs. electrochemical potential profiles show that emission occurs at potentials corresponding to oxidation of both Ethomeen and Ru(bpy)₃²⁺. The ECL emission is also pH dependent, with maximum intensities observed at pH 6-8. These results parallel those observed when tri-n-propylamine is substituted for EthomeenT/15 or T/25 and indicate a possible mechanism for ECL generation."],"dc:identifier":["https://bearworks.missouristate.edu/theses/444"],"dc:rights":["© Craig Joseph Alexander"],"dc:subject":["Chemistry"],"dc:title":["The Measurement of an Environmentally Important Surfactant System Using Electrochemiluminescence"],"thesis:degree_discipline":["Chemistry and Biochemistry"],"thesis:degree_level":["Masters"],"thesis:degree_name":["Master of Science in Chemistry"]},"updated_at":"2026-07-24T03:15:29Z"}