BS ISO 18227 pdf download Soil quality — Determination of elemental composition by X- ray fluorescence This International Standard specifies the procedure for a quantitative determination of major and traceelement concentrations in homogeneous solid waste, soil, and soil-like material by energy dispersiveX-ray fluorescence (EDXRF) spectrometry or wavelength dispersive X-ray fluorescence (WDXRFspectrometry using a calibration with matrix-matched standards. This International Standard...