1.1 本规程涵盖用于测量油漆中铅的便携式X射线荧光（XRF）仪器。当仪器的特定型号最初可用时，制造商打算将此做法应用于该型号的一个装置。制造商可自行决定对同型号仪器的其他装置进行重复测试。本规程也适用于对便携式X射线荧光仪器进行独立评估的第三方。 1.2 所有性能评估数据应采用国际单位制。 1.3 性能测试基于对各种基材上经认证的参考漆膜的重复测量。 进行测试以确定:偏差、精度、线性、检测极限、干扰、基板影响和稳定性。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 5.1 XRF仪器用于测量建筑物和相关结构中漆膜中的铅含量，以确定潜在的铅危害和可能需要的就地控制或消除，或两者兼而有之。 5.2 本规程还将用于便携式X射线机性能的实验室评估- 射线荧光仪器。 5.3 本规程将用作确定便携式X射线仪器制造商是否满足某些要求的指南，其中大多数要求涉及仪器结构。 5.4 评估可由制造商或独立方进行。结果可提交给各政府机构，并应要求提交给仪器的潜在购买者和用户。本规程的全部或部分内容也可由X射线仪器所有者/用户执行，以确定仪器的可接受性或仪器的性能是否继续可接受，或两者兼而有之。 5.5 现场测试人员可以使用本规程进行质量控制，方法是定期和重复执行文件中所述的选定活动，其方式类似于实验室仪器用户遵循的协议。 5.6 限制- 本规程在实验室中确定的偏差和精度仅提供了现场可能达到的精度估计值。现场的准确性将取决于仪器校准、基材的形式和成分、所分析的漆膜结构以及其他因素。

1.1 This practice covers portable X-ray fluorescence (XRF) instruments intended for the measurement of lead in paint. It is intended that manufacturers apply this practice to one unit of a particular model of an instrument when that model is initially available. Replicate tests on additional units of the same model of an instrument are to be performed at the discretion of the manufacturer. This practice also is intended for use by third parties performing independent evaluation of portable X-ray fluorescence instruments. 1.2 All performance evaluation data are to be in SI units. 1.3 Tests of performance are based on replicate measurements of certified reference paint films on a variety of substrate materials. Tests are performed to determine: bias, precision, linearity, limit of detection, interferences, substrate affects, and stability. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 5.1 The XRF instrument is used to measure the lead content in paint films in buildings and related structures in order to determine the potential lead hazard and the possible need for in-place control or abatement, or both. 5.2 This practice also is to be used for the laboratory evaluation of the performance of portable X-ray fluorescence instrumentation. 5.3 This practice is to be used as a guide for determining that the manufacturer of portable X-ray instrumentation has met certain requirements, most of which deal with instrument construction. 5.4 The evaluation may be performed by the manufacturer, or an independent party. The results may be presented to various government agencies and, upon request, potential purchasers and users of the instrumentation. All or parts of this practice also may be performed by an X-ray instrument owner/user to determine the acceptability of an instrument or whether the performance of an instrument continues to be acceptable, or both. 5.5 This practice may be used by field testers for quality control by performing selected activities described in the document on a regular and recurring basis in a manner similar to those protocols followed by users of laboratory instruments. 5.6 Limitation— Bias and precision, as determined in the laboratory by this practice, together provide only an estimate of the accuracy that may be achieved in the field. Accuracy in the field will depend upon the instrument calibration, the form and composition of the substrate, the structure of the paint film being analyzed, as well as other factors.