IEC TS 62607-6-30:2024 ED1

Nanomanufacturing - Key control characteristics - Part 6-30: Graphene-based material - Anion concentration: Ion chromatography method

Scope

IEC TS 62607-6-30:2024 establishes a standardized method to determine the chemical key control characteristic
- anion concentration
for powder of graphene-based material by
- ion chromatography.
In this document, the measured anions are fluoride, chloride, nitrite, bromide, nitrate, sulphate, and phosphate. These anions, present in the extraction solution of graphene-based materials, are separated into distinct elution bands on the ion chromatographic separation column and subsequently measured using a conductivity detector. Quantification of these anions is accomplished by establishing a proportional relationship between the measured signal (peak area or peak height) and the concentration of each anion. This is achieved by calibrating the system using a series of standards containing known amounts of each anion. Subsequently, unknown samples are analysed under the same conditions as the standards to determine their anion concentrations.
- Powder of graphene-based material addressed by this document includes graphene oxide, reduced graphene oxide and functionalized graphene, graphene, bilayer graphene, trilayer graphene and few-layer graphene.
Note: This document can also be used for other carbonaceous material such as graphite and graphite oxide.
- This document targets graphene-based material manufacturers and downstream users to guide their material design, production and quality control.