1 Panoramica del metodo
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 Ambito di applicazione
Determination of chromium in surface coatings of wheel hubs
3 Norma di riferimento
IEC 62312
4 Instruments and Reagents
4.1 Strumenti e attrezzature
4.1.1 Analytical Instruments
表格
| - No, no, no. | Nome | Quantità | Requisiti tecnici | Accessori |
|---|---|---|---|---|
| 1 | Spettrofotometro di assorbimento atomico di fiamma | 1 set | — | Lampada a catodo cavo al cromo |
| 2 | Acetylene Gas Cylinder | 1 cilindro | Purezza ≥ 99,99% | — |
| 3 | compressore aria | 1 unità | Pressione nominale di scarico: 0,3 MPa | — |