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In the present study, insights into the non-covalent interactions that hold the well-known chelating agent DTPA (diethylenetriaminepentaacetic acid) with inorganic elements of interest, such as europium and strontium, and their ability to form stable complexes, are investigated with two spectroscopic techniques, i.e., electrospray ionization mass spectrometry (ESI-MS) and time-resolved laser-induced fluorescence (TRLIF). First investigations are on DTPA and europium alone and end with a complete study of the Eu\u2013DTPA system. The pH variation allows one to readily investigate whether different species (protonated, hydrolyzed, etc.) exist in the pH range 2\u20139 and evaluate the stoichiometry and conditional stability constant for the Eu\u2013DTPA complex. Additional experiments by ESI-MS are reported for Sr(II) in interaction with DTPA and EDTA.<\/jats:p>","DOI":"10.1366\/00037020360696026","type":"journal-article","created":{"date-parts":[[2004,4,21]],"date-time":"2004-04-21T08:40:05Z","timestamp":1082536805000},"page":"1151-1161","source":"Crossref","is-referenced-by-count":37,"title":["Speciation Studies on DTPA Using the Complementary Nature of Electrospray Ionization Mass Spectrometry and Time-Resolved Laser-Induced Fluorescence"],"prefix":"10.1177","volume":"57","author":[{"given":"Christophe","family":"Moulin","sequence":"first","affiliation":[{"name":"CEA-Saclay, DEN\/DPC\/SECR\/LSRM. 91191 Gif sur Yvette cedex, France (C.M., B.A., V.S., G.P.); and CEA Valrho, DEN\/DRCP\/CETAMA. 30207 Bagnols sur C\u00e9ze, France (E.A.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Badia","family":"Amekraz","sequence":"additional","affiliation":[{"name":"CEA-Saclay, DEN\/DPC\/SECR\/LSRM. 91191 Gif sur Yvette cedex, France (C.M., B.A., V.S., G.P.); and CEA Valrho, DEN\/DRCP\/CETAMA. 30207 Bagnols sur C\u00e9ze, France (E.A.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Valerie","family":"Steiner","sequence":"additional","affiliation":[{"name":"CEA-Saclay, DEN\/DPC\/SECR\/LSRM. 91191 Gif sur Yvette cedex, France (C.M., B.A., V.S., G.P.); and CEA Valrho, DEN\/DRCP\/CETAMA. 30207 Bagnols sur C\u00e9ze, France (E.A.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gabriel","family":"Plancque","sequence":"additional","affiliation":[{"name":"CEA-Saclay, DEN\/DPC\/SECR\/LSRM. 91191 Gif sur Yvette cedex, France (C.M., B.A., V.S., G.P.); and CEA Valrho, DEN\/DRCP\/CETAMA. 30207 Bagnols sur C\u00e9ze, France (E.A.)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eric","family":"Ansoborlo","sequence":"additional","affiliation":[{"name":"CEA-Saclay, DEN\/DPC\/SECR\/LSRM. 91191 Gif sur Yvette cedex, France (C.M., B.A., V.S., G.P.); and CEA Valrho, DEN\/DRCP\/CETAMA. 30207 Bagnols sur C\u00e9ze, France (E.A.)"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2003,9,1]]},"reference":[{"key":"bibr1-00037020360696026","doi-asserted-by":"publisher","DOI":"10.1093\/oxfordjournals.rpd.a032975"},{"key":"bibr2-00037020360696026","doi-asserted-by":"publisher","DOI":"10.1093\/oxfordjournals.rpd.a032976"},{"key":"bibr3-00037020360696026","doi-asserted-by":"publisher","DOI":"10.1093\/oxfordjournals.rpd.a032977"},{"key":"bibr4-00037020360696026","doi-asserted-by":"publisher","DOI":"10.1093\/oxfordjournals.rpd.a032978"},{"key":"bibr5-00037020360696026","doi-asserted-by":"publisher","DOI":"10.1093\/oxfordjournals.rpd.a032979"},{"key":"bibr6-00037020360696026","volume-title":"Stability Constants of Metal-Ion Complexes, sup. 1","author":"Sillen L. 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