Browsing by Author "6548bc5f-4c75-4100-9a40-8713297e37f9"
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Morales, Libby; Toral Ponce, María Inés; Álvarez, María José (Elsevier, 2007)In this work, a characterization of reagent chromophere 5-(4-sulphophenylazo)-8-aminoquinoline [SPA] by IR and 1H RMN was carried out and a pKa value of 3.55 ± 0.03 was found as well. An 1:2 stoichiometry for the Cu(II)-SPA ...
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Morales, Libby; Toral Ponce, María (2007)A simple, rapid, and sensitive method has been developed for the simultaneous determination of trace amounts of copper and silver using 1-phenyl1,2-propanedione-2-oximethiosemicarbazone (PPDOT) as a chromogenic reagent. ...