1 Methodenblick
The wheel hub is thoroughly cleaned with ultrapure water and air-dried. A scraper is used to remove the topcoat, intermediate coating and primer on the surface. After microwave digestion, the concentration of chromium is determined by flame atomic absorption spectrometry at a wavelength of 357.9 nm.
2 Anwendungsbereich
Determination of chromium in surface coatings of wheel hubs
3 Referenzstandard
IEC 62312
4 Instruments and Reagents
4.1 Instrumente und Ausrüstung
4.1.1 Analytical Instruments
表格
| - Nein. - Nein. | Name | Menge | Technische Anforderungen | Zubehör |
|---|---|---|---|---|
| 1 | Flammenabsorptionsspektrophotometer | 1 Satz | — | Chrom Hohlkathodenlampe |
| 2 | Acetylene Gas Cylinder | 1 Zylinder | Reinheit ≥ 99,99% | — |
| 3 | Luftkompressor | 1 Einheit | Nenndruck: 0,3 MPa | — |