1.1本规程涵盖了通过热重分析（TGA）结合红外光谱技术对样品进行定性分析时常用的技术。这些技术的组合通常被称为TGA/IR。 1.2在TGA炉中使用预定温度曲线加热的样品通常会经历一次或多次重量损失。然后，使用红外光谱分析在这些失重过程中形成的材料，以确定化学特性。分析可能涉及收集离散的逸出气体样品，或者更常见的是，可能涉及在热重分析实验期间将逸出气体通过加热的流动池。TGA/IR的一般技术和其他相应技术，例如TGA与质谱联用（TGA/MS），以及TGA与GC/IR联用，在参考文献中进行了描述 (1-4) . 1.3一些热分析仪器设计为同时进行热重分析和差示扫描量热法。这种仪器有时被称为同时热分析仪（STA）。使用STA仪器进行的逸出气体分析 (5) 类似于TGA，因此，将包含在本实践中。使用同步热分析仪时，耦合方法通常标记为STA/IR。 1.4以国际单位制表示的数值应视为标准值。 本声明无意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。

1.1 This practice covers techniques that are of general use in the qualitative analysis of samples by thermogravimetric analysis (TGA) coupled with infrared (IR) spectrometric techniques. The combination of these techniques is often referred to as TGA/IR. 1.2 A sample heated in a TGA furnace using a predetermined temperature profile typically undergoes one or more weight losses. Materials evolved during these weight losses are then analyzed using infrared spectroscopy to determine chemical identity. The analysis may involve collecting discrete evolved gas samples or, more commonly, may involve passing the evolved gas through a heated flowcell during the TGA experiment. The general techniques of TGA/IR and other corresponding techniques, such as TGA coupled with mass spectroscopy (TGA/MS), as well as, TGA, used in conjunction with GC/IR, are described in the referenced literature (1-4) . 1.3 Some thermal analysis instruments are designed to perform both thermogravimetric analysis and differential scanning calorimetry simultaneously. This type of instrument is sometimes called a simultaneous thermal analyzer (STA). The evolved gas analysis performed with an STA instrument (5) is similar to that with a TGA, and so, would be covered by this practice. With use of a simultaneous thermal analyzer, the coupled method typically is labeled STA/IR. 1.4 The values stated in SI units are to be regarded as standard. This statement 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.