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Analytical and Bioanalytical Chemistry

, Volume 406, Issue 17, pp 4261–4272 | Cite as

Improvements in analytical methodology for the determination of frequently consumed illicit drugs in urban wastewater

  • Lubertus Bijlsma
  • Eduardo Beltrán
  • Clara Boix
  • Juan V. Sancho
  • Félix HernándezEmail author
Research Paper

Abstract

Rapid and sensitive analytical methodology based on ultra high-performance liquid chromatography-tandem mass spectrometry has been developed for the determination of widely consumed drugs of abuse (amphetamines, MDMA, cocaine, opioids, cannabis and ketamine) and their major metabolites in urban wastewaters. Sample clean-up and pre-concentration was performed by a generic off-line SPE procedure using Oasis HLB. Special effort was made to incorporate amphetamine, which was found highly problematic in the wastewater samples tested, including an additional clean-up with Oasis MCX SPE and dispersive primary secondary amine. Correction for possible SPE losses or degradation during storage was made by the use of isotope-labelled internal standards (ILIS), available for all compounds, which were added to the samples as surrogates. Although ILIS were also efficient for matrix effects correction, the strong ionization suppression observed was not eliminated; therefore, a four-fold dilution prior to SPE was applied to influent wastewaters and a low injection volume was selected (3 μL), in order to reach a compromise between matrix effects, chromatographic performance and sensitivity. The method was validated at 25 and 200 ng L−1 (effluent), and 100 and 800 ng L−1 (influent), obtaining limits of quantification (i.e. the lowest level that the compound can be quantified and also confirmed with at least two MS/MS transitions) between 0.4–25 ng L−1 (effluent) and 2–100 ng L−1 (influent). The applicability of the method was demonstrated by analysis of 14 influent and 14 effluent wastewater samples collected over 2 weeks in Castellón (Spain) within a European collaborative study.

Keywords

Drugs of abuse Triple quadrupole Ultra high-performance liquid chromatography Sample dilution Matrix effects Urban wastewater 

Notes

Acknowledgments

The authors are very grateful to the Sociedad de Fomento Agrícola Castellonense (FACSA) for providing wastewater samples and to the Serveis Centrals d’Instrumentació Científica (SCIC) of University Jaume I for using the Xevo TQS triple quadrupole mass spectrometer. This work has been developed under financial support provided by the Plan Nacional de I+D+I, Ministerio de Economía y Competitividad (Project ref CTQ2012-36189). The authors also acknowledge the financial support from Generalitat Valenciana (Group of Excellence Prometeo 2009/054; Collaborative Research on Environment and Food Safety ISIC/2012/016) and SEWPROF MC ITN project: ‘A new paradigm in drug use and human health risk assessment: Sewage profiling at the community level’ from the People Programme (Marie Curie Actions) of the European Union's 7th Framework Programme FP7/2007–2013/under REA grant agreement no. [317205].

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Lubertus Bijlsma
    • 1
  • Eduardo Beltrán
    • 1
  • Clara Boix
    • 1
  • Juan V. Sancho
    • 1
  • Félix Hernández
    • 1
    Email author
  1. 1.Research Institute for Pesticides and WaterUniversity Jaume ICastellónSpain

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