Comparing Field Portable X-Ray Fluorescence (XRF) To Laboratory Analysis Of Heavy Metals In Soil (Report) - Shefsky, S., NITON Corporation, Quality assurance protocols for using XRF in the field usually require splits between field and fixed lab analysis. The comparability of XRF data with fixed lab data varies with site conditions, soil composition, and sample preparation. Poor correlation often arises from the introduction of error in the confirmatory sample splitting and sample handling procedures, and which may be misinterpreted as a deficiency of the field method. Comparing Field Portable X-Ray Fluorescence (XRF) to Laboratory Analysis of Heavy Metals in Soil(104 KB)