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Determination of o,oEDDHA - a xenobiotic chelating agent used in Fe fertilizers - in plant tissues by liquid chromatography/electrospray mass spectrometry: overcoming matrix effects

AuthorsOrera Utrilla, Irene ; Abadía Bayona, Anunciación ; Abadía Bayona, Javier ; Álvarez-Fernández, Ana
Xenobiotic agent
Ethylenediamine derivative
Ethylenediamine-N,N'-bis(2-hydroxyphenylacetic acid)
Ethylenediamine n,n' bis(2 hydroxyphenylacetic acid)
Issue Date15-Jun-2009
PublisherJohn Wiley & Sons
CitationRapid Communications in Mass Spectrometry 23 (11): 1694-1702 (2009)
AbstractThe Fe(III)-chelate of ethylenediamine-N,N(-bis(o-hydroxyphenylacetic) acid (o,oEDDHA) is generally considered as the most efficient and widespread Fe fertilizer for fruit crops and intensive horticulture. The determination of the xenobiotic chelating agent o,oEDDHA inside the plant is a key issue in the study of this fertilizer. Both the low concentrations of o,oEDDHA expected and the complexity of plant matrices have been important drawbacks in the development of analytical methods for the determination of o,oEDDHA in plant tissues. The determination of o,oEDDHA in plant materials has been tackled in this study by liquid chromatography coupled to mass spectrometry using several plant species and tissues. Two types of internal standards have been tested: Iron stable isotope labeled compounds and a structural analogue compound, the Fe(III) chelate of ethylenediamine-N,N(-bis(2-hydroxy-4-methylphenylacetic) acid (o,oEDDHMA). Iron stable isotope labeled internal standards did not appear to be suitable because of the occurrence of isobaric endogenous compounds and/or isotope exchange reactions between plant native Fe pools and the Fe stable isotope of the internal standard. However, the structural analogue Fe(III)-o,oEDDHMA is an adequate internal standard for the determination of both isomers of o,oEDDHA (racemic and meso) in plant tissues. The method was highly sensitive, with limits of detection and quantification in the range of 3-49 and 11-162 pmol g-1 fresh weight, respectively, and analyte recoveries were in the range of 74-116%. Using this methodology, both o,oEDDHA isomers were found in all tissues of sugar beet and tomato plants treated with 90mM Fe(III)-o,oEDDHA for 24 h, including leaves, roots and xylem sap. This methodology constitutes a useful tool for studies on o,oEDDHAplant uptake, transport and allocation.© 2009 John Wiley & Sons, Ltd.
Publisher version (URL)http://dx.doi.org/10.1002/rcm.4056
Identifiersdoi: 10.1002/rcm.4056
issn: 0951-4198
Appears in Collections:(EEAD) Artículos
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