1 Yöntem Genel Bakış
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. Uygulama Kapsamı
Determination of chromium in surface coatings of wheel hubs
3 Referans Standardı
IEC 62312
4 Instruments and Reagents
4.1 Aletler ve Ekipmanlar
4.1.1 Analytical Instruments
表格
| - Hayır. - Hayır. | İsim | Miktar | Teknik Gereksinimler | Aksesuarlar |
|---|---|---|---|---|
| 1 | Alev Atom Emme Spektrofotometri | 1 set | — | Krom Boş Katod Lambası |
| 2 | Acetylene Gas Cylinder | 1 silindir | Saflık ≥% 99,99 | — |
| 3 | Hava Kompresörü | 1 birim | Nominal egzoz basıncı: 0.3 MPa | — |