IEC IEC TS 62607-6-21 Edition 1.02022-09 TECHNICAL SPECIFICATION colour inside Nanomanufacturing - Key control characteristics Part 6-21: Graphene-based material - Elemental composition, C/O ratio: X-ray photoelectron spectroscopy IEC TS 62607-6-21:2022-09(en) IEC IEC TS 62607-6-21 Edition 1.02022-09 TECHNICAL SPECIFICATION colour inside Nanomanufacturing - Key control characteristics Part 6-21: Graphene-based material - Elemental composition, C/O ratio: X-ray photoelectron spectroscopy IEC TS 62607-6-21:2022-09(en) IEC IEC TS 62607-6-21 Edition 1.02022-09 TECHNICAL SPECIFICATION colour inside Nanomanufacturing - Key control characteristics Part 6-21: Graphene-based material - Elemental composition, C/O ratio: X-ray photoelectron spectroscopy IEC TS 62607-6-21:2022-09(en)