2 D simultaneous measurement of the oxyanions of P , V , As , Mo , Sb , W and

Environmental impact statement: This paper presents advances in a sampling technique that allows the co-analysis of anions of P, V, As, Mo, Sb, W, U and sulphide in sediment. Coanalysis of sediment solutes is particularly valuable as it allows interpretation of geochemical processes based on the behaviour of multiple analytes at the same precise time and locations. This technique has the ability to provide information on sub-mm scale processes within sediment, including in two-dimensions, and also profiling across the sediment-water interface. It has potential applications in the monitoring or assessment of the mobility of pollution from mine wastes (e.g. As and Sb). The technique can also be adapted for looking at the geochemistry of the target elements at the soil-plant root interface.