1 Method Overview After the sample is digested with aqua regia, the measurement is performed using an air‑acetylene flame at the instrument wavelength of 248.3 nm.
2 Scope of Application This method is applicable to the determination of iron in graphite powder.
3 Reference Basis GB/T 24533‑2009
4 Instruments and Reagents
4.1 Instruments and Equipment
4.1.1 Testing Instruments
| No. | Name | Quantity | Technical Requirement | Accessories |
|---|---|---|---|---|
| 1 | Flame Atomic Absorption Spectrophotometer | 1 set | — | Iron Hollow‑Cathode Lamp |
| 2 | Acetylene | 1 cylinder | Purity ≥99.99% | — |
| 3 | Air Compressor | 1 set | Rated exhaust pressure: 0.3 MPa | — |
