The Validation of Field-Portable X-Ray Fluorescence Spectrometry for the Analysis of Metals in Marine Sediments

摘要

The primary focus of this study has been the determiantion of FPXRF detection limits of metals, specifically Cu, Zn and Pb, in marine sediments in the field, and the demonstration of the capabilities of the portable instrument relative to detailed standard chemical analyses. Instrumnet detection limits have been determined, and these have been compared to the manufacturer-stated detection limits. The lower linear range of the instrument was examined for Cu, Zn and Pb using serial dilutions of a standard reference material, PACS-1 marine sediment (NRCC, Ottawa, ACanada). Results from FPXRF analyses of sediment samples from various locations have been compared with results from standard analyses (ICP, AAS, Laboratory XRF). The data are used to draw correlations between the different methods, as well as to aid in establishing detection limits. The ability to reliably detect metals in sediments would allow for the generation of data from sediment grabs in a time-frame that could gruide on site decision making for mapping strategies and detailed sampling.