1 Resumo do Método
The sample is heated and dissolved in a quartz beaker with mixed sulfuric phosphoric acid. Using an air acetylene flame, the absorbance of sodium oxide is measured at 589.0 nm on an atomic absorption spectrophotometer. Within a certain concentration range, the absorbance of sodium is proportional to its content, and quantification is carried out by comparison with the standard series.
2. Âmbito de aplicação
This method is applicable to the determination of sodium oxide content in alumina powder.
3 Reference Basis
GB/T 6609.5-2004, Methods for chemical analysis and physical property testing of alumina — Determination of sodium oxide content, Method 2
4 Instrumentos e Reagentes
4.1 Instrumentos e equipamento
4.1.1 Testing Instruments
| Não. | Nome | Quantidade | Requisitos técnicos | Acessórios |
| 1 | Atomic Absorption Spectrophotometer (TAS 990) | 1 conjunto | — | Sodium Hollow-Cathode Lamp |
| 2 | Compressor de ar | 1 conjunto | Pressão de escape estimada: 0,3 MPa | — |
| 3 | Acetileno | 1 cilindro | Purity ≥99.99% | — |
