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Separation of phthalates by cyclodextrin modified micellar electrokinetic chromatography: Quantitation in perfumes

AutorPérez-Fernández, Virginia; González, Maria José; García, Maria Ángeles; Marina, María Luisa
Palabras clavePhthalate
Perfume
Bile salt
Cyclodextrin
Micellar electrokinetic chromatography
Fecha de publicación2013
EditorElsevier
CitaciónAnalytica Chimica Acta 782: 67-74 (2013)
ResumenA new CE method has been developed for the simultaneous separation of a group of parent phthalates. Due to the neutral character of these compounds, the addition of several bile salts as surfactants (sodium cholate (SC), sodium deoxycholate (SDC), sodium taurodeoxycholate (STDC), sodium taurocholate (STC)) to the separation buffer was explored showing the high potential of SDC as pseudostationary phase. However, the resolution of all the phthalates was not achieved when employing only this bile salt as additive, being necessary the addition of neutral cyclodextrins (CD) and organic modifiers to the separation media. The optimized cyclodextrin modified micellar electrokinetic chromatography (CD-MEKC) method consisted of the employ of a background electrolyte (BGE) containing 25. mM β-CD-100. mM SDC in a 100. mM borate buffer (pH 8.5) with a 10% (v/v) of acetonitrile, employing a voltage of 30. kV and a temperature of 25. °C. This separation medium enabled the total resolution of eight compounds and the partial resolution of two of the analytes, di-n-octyl phthalate (DNOP) and diethyl hexyl phthalate (DEHP) (Rs ~ 0.8), in only 12. min. The analytical characteristics of the developed method were studied showing their suitability for the determination of these compounds in commercial perfumes. In all the analyzed perfumes the most common phthalate was diethyl phthalate (DEP) that appeared in ten of the fifteen analyzed products. Also dimethyl phthalate (DMP), diallyl phthalate (DAP), dicyclohexyl phthalate (DCP), and di-n-pentyl phthalate (DNPP) were found in some of the analyzed samples.
URIhttp://hdl.handle.net/10261/108585
DOI10.1016/j.aca.2013.03.072
Identificadoresdoi: 10.1016/j.aca.2013.03.072
issn: 0003-2670
e-issn: 1873-4324
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