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A new analytical method based on micellar electrokinetic chromatography tandem mass spectrometry (MEKC-ESI-MS/MS) employing a MS friendly surfactant (ammonium perfluorooctanoate) is proposed and(More)
A system for on-line preconcentration and determination of lead by flame atomic absorption spectrometry (FAAS) was proposed. It was based on the sorption of lead(II) ions on a minicolumn of(More)
The characterization and authentication of fats and oils is a subject of great importance for market and health aspects. Identification and quantification of triacylglycerols in fats and oils can be(More)
A CE instrument coupled with chemiluminescence (CL) detection was designed for the determination of promethazine hydrochloride (PTH) and promazine hydrochloride (PMH) in real samples. An important(More)