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Programed nebulizing‐gas pressure mode for quantitative capillary electrophoresis‐mass spectrometry analysis of endocrine disruptors in honey
Author(s) -
DomínguezÁlvarez Javier,
RodríguezGonzalo Encarnación,
HernándezMéndez Jesús,
CarabiasMartínez Rita
Publication year - 2012
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.201100577
Subject(s) - chromatography , chemistry , capillary electrophoresis , electrospray , mass spectrometry , detection limit , extraction (chemistry) , quantitative analysis (chemistry) , analytical chemistry (journal) , electrospray mass spectrometry , resolution (logic) , electrophoresis , artificial intelligence , computer science
The application of programed nebulizing‐gas pressure ( PNP ) has been previously described to be a simple strategy for the separation of anions by capillary electrophoresis‐electrospray‐mass spectrometry ( CE ‐ ESI ‐ MS ). The PNP mode provided high resolution and stable analyses and also had the advantage of allowing the use of capillaries wider than the 50–75 μm conventional ones. Here, the application of the PNP approach to the quantitative analysis of pollutants in real samples by CE ‐ ESI ‐ MS is described for the first time; in particular, for the determination several endocrine disruptors (2,4‐dichlorophenol, 2,4,5‐trichlorophenol, pentachlorophenol, bisphenol‐A, 4‐tert‐butyl‐phenol, and 4‐tert‐butyl benzoic acid) in honey. For sample pretreatment, different liquid–liquid extraction ( LLE ) procedures were assayed and compared to the Q u EC h ERS © methodology prior to electrophoretic analysis. With the application of the PNP approach to CE ‐ ESI ‐ MS , the limits of detection achieved were in the 1–4 ng/g range with a simple liquid–liquid procedure without any further clean‐up step; relative standard deviation values in the 2–9% range were found. The analytical characteristics allow the proposed method to be used in the control analysis of these compounds in honey.