本文件规定了使用手持或便携式能量色散X射线荧光光谱法（ED-XRF）设备筛选土壤中选定元素的程序。它涵盖了这种筛选方法的应用，以获得定性或半定量数据，以帮助决定采用实验室分析化学方法详细评估土壤质量的取样策略。 注1筛选方法通常提供指示浓度值的定性或半定量浓度值，尽管偶尔它们可以在特定或有限条件下给出定量结果。 注2:对土壤样品进行预处理的努力越大，预期的分析结果就越好（见e。g.参考文献[19])。 本文件没有明确规定其适用的要素，因为适用性取决于设备的性能和筛选的目的。可以测定的元素受到所用仪器的性能、土壤中存在的特定元素的浓度以及调查对最低关注浓度（例如指导值）的要求的限制。 注3 As、Cd、Co、Cr、Cu、Hg、Mo、Ni、Pb、Sb、Sn、V和Zn的XRF测量值按照附录A中的描述进行了验证。 注4附录B提供了使用手持式ED-XRF光谱仪和便携式ED-XRF光谱仪进行筛选时有用的示例。 本文件未就如何使用设备提供定量数据以用于详细的现场评估提供指导。本文件未涵盖如何综合多次测定的结果以满足ED-XRF测定的目的。

This document specifies the procedure for screening soils for selected elements using handheld or portable equipment for energy dispersive X-ray fluorescence spectrometry (ED-XRF). It covers the application of this screening method to obtain qualitative or semi-quantitative data to assist decisions on a sampling strategy for detailed assessment of soil quality employing laboratory analytical chemical methods.

NOTE 1        Screening methods generally provide qualitative or semi-quantitative concentration values that are indicative of concentration values, although occasionally they can give quantitative results under specific or limited conditions.

NOTE 2        The greater the effort applied to the pretreatment of soil samples, the better the analytical results that can be expected (see e.g. Reference [19]).

This document does not explicitly specify elements for which it is applicable, since the applicability depends on the performance of the apparatus and the objective of the screening. The elements which can be determined are limited by the performance of the instrument used, the concentrations of particular elements present in the soil, and the requirements of the investigation in terms of the minimum concentrations of concern (e.g. guideline value).

NOTE 3        The XRF measurements of As, Cd, Co, Cr, Cu, Hg, Mo, Ni, Pb, Sb, Sn, V and Zn were validated as described in Annex A.

NOTE 4        Annex B provides examples of when screening with a handheld ED-XRF spectrometer and a portable ED-XRF spectrometer can be useful.

This document does not provide guidance on how to use the equipment to provide quantitative data for use in detailed site assessments. This document does not cover how the results of multiple determinations are synthesized to address the objectives of an ED-XRF determination.