1.1 本规程描述了测量实验室用于估计和报告测量结果的不确定度的协议，当测量结果来自通过分光光度法获得的被测量时。 1.2 这种做法特别局限于以ΔE格式报告为色差的颜色测量结果的不确定度报告，即使测量本身可能以其他单位报告，如百分比反射率或透射率。 1.3 此处定义的程序不适用于国家标准化实验室或转移实验室。 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）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 许多合格的测量实验室符合公认的质量体系要求，如ISO 9001、QS 9000或ISO 17025。当使用标准测试方法时，测量结果应在实验室测量系统的组合不确定度范围内与其他类似实验室的测量结果一致。正是由于这个原因，质量体系要求在每个测试结果的同时附上测试结果的不确定性声明。 5.2 根据ISO 17025，不确定度估算的编制是实验室认证的一项要求。本规程描述了计算此类不确定性估计的程序。

1.1 This practice describes a protocol to be utilized by measurement laboratories for estimating and reporting the uncertainty of a measurement result when the result is derived from a measurand that has been obtained by spectrophotometry. 1.2 This practice is specifically limited to the reporting of uncertainty of color measurement results that are reported as color-differences in ΔE format, even though the measurement itself may be reported in other units such as percent reflectance or transmittance. 1.3 The procedures defined here are not intended to be applicable to national standardizing laboratories or transfer laboratories. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 Many competent measurement laboratories comply with accepted quality system requirements such as ISO 9001, QS 9000, or ISO 17025. When using standard test methods, the measurement results should agree with those from other similar laboratories within the combined uncertainty limits of the laboratories’ measurement systems. It is for this reason that quality system requirements demand that a statement of the uncertainty of the test results accompany every test result. 5.2 Preparation of uncertainty estimates is a requirement for laboratory certification under ISO 17025. This practice describes the procedures by which such uncertainty estimates may be calculated.