This practice provides general guidelines for the practice of thermogravimetry coupled with infrared spectrometric detection and analysis (TGA/IR). This practice assumes that the thermogravimetry involved in the practice is proper. It is not the intention of this practice to instruct the user on proper thermogravimetric techniques. Please refer to Test Method E 1131
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.
对于更高温度范围的应用,可选择同步热分析仪系列,该系列仪器将 TG 与 DSC 功能结合为一体,上限温度可达 2400℃,也可配备单热重支架进行单独的高温热重测量。NETZSCH TG 符合下列国际标准:ISO 11358, ISO/DIS 9924, ASTM E 1131, ASTM D 3850, DIN 51006。...
热重分析(Thermogravimetric Analysis,TG或TGA)是指在程序控制温度下测量待测样品的质量与温度变化关系的一种热分析技术,用来研究材料的热稳定性和组分。TGA在研发和质量控制方面都是比较常用的检测手段。热重分析在实际的材料分析中经常与其他分析方法联用,进行综合热分析,全面准确分析材料。 ...
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