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ISO/TS 23690:2023

Nanotechnologies - Multiwall carbon nanotubes - Determination of carbon impurity content by thermogravimetric analysis
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ISO/TS 23690:2023

Nanotechnologies - Multiwall carbon nanotubes - Determination of carbon impurity content by thermogravimetric analysis

PUBLISH DATE 2023
ISO/TS 23690:2023

This document specifies a *mild oxidation method* to determine the content of carbon impurities (carbon material content not in the form of CNT, including amorphous carbon and trace amounts of other types of structured carbon) less stable than multiwall carbon nanotubes (MWCNTs) by thermogravimetric analysis (TGA) under carbon dioxide atmosphere.

This document is applicable to the characterization of carbon impurities content in MWCNT samples prepared by chemical vapour deposition (CVD). Measurement of carbon impurities in MWCNT samples prepared by other methods can refer to this document. This method is not applicable to *functionalized MWCNT samples* or MWCNT samples with encapsulant species.

NOTE This method is applicable for the case of TG curves with a single-stage.

SDO ISO: International Organization for Standardization
Document Number ISO/TS 23690
Publication Date July 1, 2023
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO/TC 229
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