A Comprehensive Study of Three Different Portable XRF Scanners to Assess the Soil Geochemistry of An Extensive Sample Dataset

摘要: The assessment of soil elemental concentrations nowadays mainly occurs through conventional laboratory analyses. However, proximal sensing (PSS) techniques such as X-ray fluorescence (XRF) spectrometry are proving to reduce analysis time and costs, thus offer a worthy alternative Moreover, XRF scanners non-destructive can be directly employed in the field. Although use for is becoming widely accepted, most previous studies were limited one scanner, few samples, elements, or non-diverse sample database. Here, an extensive diverse database was used compare performance three different with results obtained Scanners benchtop mode built-in calibrations measure 15 elements. many samples Cu, S, P, Mg up 6, 12, 13, 5 times overestimated by XRF, empirical recalibration recommended, all produced acceptable results, even lighter Unexpectedly, did not seem depend on characteristics CaCO3 content. While performances will worse when expanding field, our show that easily applied non-experts reliably environments.