1 방법 개요
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. 적용 범위
Determination of chromium in surface coatings of wheel hubs
3 참조 표준
IEC 62312
4 Instruments and Reagents
4.1 기기 및 장비
4.1.1 Analytical Instruments
表格
| 아니야 | 이름 | 수량 | 기술적 요구 사항 | 부속품 |
|---|---|---|---|---|
| 1 | 불꽃 원자 흡수 분광광계는 | 1 세트 | — | 크롬 빈 양극 램프 |
| 2 | Acetylene Gas Cylinder | 1 실린더 | 순수성 ≥ 99.99% | — |
| 3 | 공기 압축기 | 1 단위 | 정격 배기 압력: 0.3 MPa | — |