本文件给出了在惰性或氧化环境中通过热重分析（TGA）对含碳纳米管（CNT）样品进行表征的指南。通过定量测量材料中存在的碳物种类型以及非碳杂质（例如金属催化剂颗粒），提供CNT样品纯度评估指南。 此外，该技术还对含碳纳米管样品的热稳定性和均匀性进行了定性评估。需要额外的表征技术来确认特定类型的CNT的存在，并验证存在的金属杂质的组成。

This document gives guidelines for the characterization of carbon nanotube (CNT)-containing samples by thermogravimetric analysis (TGA), performed in either an inert or oxidizing environment. Guidance is provided on the purity assessment of the CNT samples through a quantitative measure of the types of carbon species present as well as the non-carbon impurities (e.g. metal catalyst particles) within the material. In addition, this technique provides a qualitative assessment of the thermal stability and homogeneity of the CNT-containing sample. Additional characterization techniques are required to confirm the presence of specific types of CNT and to verify the composition of the metallic impurities present.