1.1 本规程涵盖了分光光度性能参数，这些参数对于测试大多数常规测试和方法中仪器的充分性至关重要 2. 在200 nm至700 nm，吸光度范围为0至2。推荐的测试提供了分光光度法中控制结果的重要参数的测量，但特别不能推断仪器性能的所有因素都被测量。 1.2 对于光谱带宽不超过2 nm且制造商关于波长和吸光度精度的规范不超过此处所采用的性能公差的仪器，本规程可作为其性能的重要测试。 该实践采用±1的说明性公差 % 相对于0.2至2.0范围内的吸光度标度误差，相对于波长标度误差为±1.0nm。建议的最大杂散辐射功率比为4×10 -4 产量<1 % 吸光度为2时的吸光度偏差。这些公差选择为与许多化学应用兼容，同时舒适地超过参考材料的认证值的不确定度以及被测仪器的波长和吸光度标度误差的典型制造商规范。鼓励用户制定和使用更适合最终用途要求的公差值。该程序旨在持续验证定量性能，并将一台仪器的性能与其他类似装置的性能进行比较。 参考实践 第275页 广泛评估仪器的性能。 1.3 这种做法应定期进行，其频率取决于使用仪器的物理环境。因此，在恶劣条件下（暴露于灰尘、化学蒸汽、振动或其组合）粗暴处理或使用的装置应比未暴露于此类条件的装置更频繁地进行测试。在对装置进行任何重大维修（如涉及光学、探测器或辐射能源的维修）后，也应执行此操作。 1.4 以国际单位表示的值应视为标准值。本标准不包括其他计量单位。 1.5 本标准并不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建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 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》中确立的国际公认标准化原则制定的。 =====意义和用途====== 4.1 这种做法允许分析员将仪器的性能与制造商提供的性能规范进行比较，并验证其是否适合继续日常使用。 它还提供定期生成校准监测数据，形成一个基础，从中可以明显看出仪器性能的任何变化。

1.1 This practice covers the parameters of spectrophotometric performance that are critical for testing the adequacy of instrumentation for most routine tests and methods 2 within the wavelength range of 200 nm to 700 nm and the absorbance range of 0 to 2. The recommended tests provide a measurement of the important parameters controlling results in spectrophotometric methods, but it is specifically not to be inferred that all factors in instrument performance are measured. 1.2 This practice may be used as a significant test of the performance of instruments for which the spectral bandwidth does not exceed 2 nm and for which the manufacturer's specifications for wavelength and absorbance accuracy do not exceed the performance tolerances employed here. This practice employs an illustrative tolerance of ±1 % relative for the error of the absorbance scale over the range of 0.2 to 2.0, and of ±1.0 nm for the error of the wavelength scale. A suggested maximum stray radiant power ratio of 4 × 10 -4 yields <1 % absorbance bias at an absorbance of 2. These tolerances are chosen to be compatible with many chemical applications while comfortably exceeding the uncertainty of the certified values for the reference materials and typical manufacturer's specifications for error in the wavelength and absorbance scales of the instrument under test. The user is encouraged to develop and use tolerance values more appropriate to the requirements of the end use application. This procedure is designed to verify quantitative performance on an ongoing basis and to compare one instrument's performance with that of other similar units. Refer to Practice E275 to extensively evaluate the performance of an instrument. 1.3 This practice should be performed on a periodic basis, the frequency of which depends on the physical environment within which the instrumentation is used. Thus, units handled roughly or used under adverse conditions (exposed to dust, chemical vapors, vibrations, or combinations thereof) should be tested more frequently than those not exposed to such conditions. This practice should also be performed after any significant repairs are made on a unit, such as those involving the optics, detector, or radiant energy source. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 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. 1.6 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 ====== 4.1 This practice permits an analyst to compare the performance of an instrument to the manufacturer's supplied performance specifications and to verify its suitability for continued routine use. It also provides generation of calibration monitoring data on a periodic basis, forming a base from which any changes in the performance of the instrument will be evident.