Concurrent sampling of transitional and coastal waters by Diffusive Gradient in Thin-films (DGT) and spot sampling for trace metals analysis

Bersuder, P. and Amouroux, I. and Belzunce-Segarra, M.J. and Bolam, T. and Caetano, M. and Carvalho, I. and Correia dos Santos, M. and Fones, G.R. and Gonzalez, J.-L. and Guesdon, S. and Larreta, J. and Marras, B. and McHugh, B. and Menet-Nédélec, F. and Menchaca, I. and Gabet, V.M. and Montero, N. and Nolan, M. and Regan, F. and Robinson, C.D. and Rosa, N. and Sanz, M.R. and Rodríguez, J.G. and Schintu, M. and White, B. and Zhang, H. (2021) Concurrent sampling of transitional and coastal waters by Diffusive Gradient in Thin-films (DGT) and spot sampling for trace metals analysis. MethodsX, 8: 101462. ISSN 2215-0161

Abstract

This protocol was developed based on the knowledge acquired in the framework of the Interreg MONITOOL project (EAPA_565/2016) where extensive sampling campaigns were performed in transitional and coastal waters covering eight European countries. It provides detailed procedures and guidelines for the sampling of these waterbodies by concurrent collection of discrete water samples and the deployment of Diffusive Gradient in Thin-films (DGT) passive samplers for the measurement of trace metal concentrations. In order to facilitate the application of this protocol by end-users, it presents steps to follow in the laboratory prior to sampling campaigns, explains the procedures for field campaigns (including in situ measurement of supporting parameters) and subsequent sample processing in the laboratory in preparation for trace metal analyze by inductively coupled plasma-mass spectrometry (ICP-MS) and voltammetry. The protocol provides a systematic, coherent field sampling and sample preparation strategy that was developed in order to ensure comparability and reproducibility of the data obtained from each project Partner in different regions. • Standardization of the concurrent sampling of transitional and coastal waters by DGT passive samplers and spot sampling. • Robust procedures and tips based on existing international standards and comprehensive practical experience.