Journal
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
Volume 92, Issue 12, Pages 1429-1442Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/03067319.2011.561337
Keywords
terbuthylazine; metabolites; solid phase extraction; sediments; constructed wetlands; HPLC
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Funding
- Thermo Electron (Waltham, MA)
- Public Benefit Foundation of Alexandros S. Onassis
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This paper describes the development of a new analytical method for the analysis of the herbicide TER and its degradation products in sediment samples. This method, based on high-performance liquid chromatography with diode-array detection, was validated for the simultaneous determination of TER and its major metabolites, desethylterbuthylazine, desisopropyatrazine, hydroxyterbuthylazine, desethylhydroxyatrazine and desethylhydroxyterbuthylazine. This method includes a cleanup and a solid-phase extraction step, using ultra-pure water and MCX cartridges respectively, with an overall recovery efficiency ranging from 89.3 to 97.9%. The statistical evaluation demonstrates good linearity with correlation coefficients >0.999 and adequate accuracy and precision for all analytes, with% Er and RSD values up to 10.5% and 8.3% respectively. The limit of detection for all substances was found to be 3.3 ng g(-1). This method can be employed in remediation studies of TER and its major metabolites in sediments of constructed wetlands leading to useful results for the degradation and dispersion of TER in the vertical profile of wetland sediment substrates.
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