addresses the most important issues to consider during arsenic speciation in algae, including new sections on Occurrence, distribution, and significance of arsenic speciation, Biogeochemistry of arsenic in aquatic environments: the role of speciation, Sampling and sampling processing: fit for purpose techniques, Separation methods applied to arsenic speciation, Detection and quantification of arsenic compounds, Analytical approaches for proteomics and lipidomics of arsenic in algae, Quality control and quality assurance issues in arsenic speciation, Arsenic speciation in algae: case studies in Europe, and more.