1.1 红外光谱（IR）是识别和比较压敏胶带的一种有价值的方法 ( 1- 20 ) . 2. 本指南提供了有关红外光谱仪和附件的基本建议和信息，重点介绍了特定于压敏胶带检查的采样技术。每个检验员或实验室采用的特定方法将取决于可用设备、检验员培训、样品适用性和样品大小。 1.2 本指南适用于具有红外光谱仪使用理论基础知识和熟练程度，以及处理和鉴定压敏胶带经验的检验员。此外，本指南将与更广泛的分析方案结合使用 ( 21- 23 ) . 1.3 免责声明:本指南提供了一组用于执行一个或多个特定操作的说明。本标准不能取代通过适当教育、培训和经验获得的知识、技能或能力，应与良好的专业判断结合使用。 1.4 以国际单位制表示的数值应视为标准值。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 本指南旨在帮助检查员选择适当的样品制备方法，以分析、比较和识别压敏胶带。如果已知和未知样品在物理外观或测量方面没有发现有意义的差异，那么红外光谱应该是分析方案的下一步。 5.2 红外光谱可以提供有关主要有机和无机成分的分子信息。由于各种原因，数量较少的成分通常更难明确识别。其原因包括主要成分的吸收带与次要成分的弱吸收带的干扰，以及次要成分浓度低于仪器检测限的灵敏度问题。 5.3 红外光谱法可用于获得光谱，以说明胶带的化学成分，并用于比较两个或多个胶带样品。当用于光谱比较时，目的是确定样本之间是否存在任何有意义的差异。

1.1 Infrared spectroscopy (IR) is a valuable method for the identification and comparison of pressure sensitive tapes ( 1- 20 ) . 2 This guide provides basic recommendations and information about infrared spectrometers and accessories, with an emphasis on sampling techniques specific to pressure sensitive tape examinations. The particular method(s) employed by each examiner or laboratory will depend upon available equipment, examiner training, sample suitability, and sample size. 1.2 This guide is intended for examiners with a basic knowledge of the theory and proficiency in the use of infrared spectroscopy as well as experience in the handling and forensic examination of pressure sensitive tapes. Further, this guide is to be used in conjunction with a broader analytical scheme ( 21- 23 ) . 1.3 Disclaimer: This guide offers a set of instructions for performing one or more specific operations. This standard cannot replace knowledge, skill, or the ability acquired through appropriate education, training, and experience and should be used in conjunction with sound professional judgment. 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 5.1 This guide is designed to assist an examiner in the selection of appropriate sample preparation methods for the analysis, comparison, and identification of pressure sensitive adhesive (PSA) tapes. If no meaningful differences are noted between the known and unknown samples regarding physical appearance or measurements, then IR spectroscopy should be the next step in the analytical scheme. 5.2 Infrared spectroscopy can provide molecular information regarding major organic and inorganic components. For various reasons, components in lesser amounts are typically more difficult to identify unequivocally. Reasons for this include interference of the absorption bands of the major components with the less intense bands of minor components and sensitivity issues whereby the minor components are present at concentrations below the detection limits of the instrument. 5.3 Infrared spectroscopy can be used to obtain spectra for elucidation of the chemical composition of a tape and for comparison of two or more tape samples. When used for spectral comparisons, the objective is to determine whether any meaningful differences exist between the samples.