1. Faculty of
Chemistry, Department
of Physical and Analytical Chemistry, University of Oviedo, Julián Clavería 8, 33006 Oviedo, Spain
2. Research Institute for Pesticides
and Water, University Jaume I, 12071, Castellón,
Spain
3. Analytical Chemistry
Division,
Material Measurement Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Stop 8391,
Gaithersburg, Maryland, 20899, United States