1 Tổng quan phương pháp
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. Phạm vi áp dụng
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. Dụng cụ và hóa chất
4.1 Dụng cụ và thiết bị
4.1.1 Testing Instruments
| Không. | Tên | Số lượng | Yêu cầu kỹ thuật | Phụ kiện |
| 1 | Atomic Absorption Spectrophotometer (TAS 990) | 1 bộ | — | Sodium Hollow-Cathode Lamp |
| 2 | Máy nén khí | 1 bộ | Áp suất khí thải định mức: 0,3 MPa | — |
| 3 | Acetylen | 1 xi lanh | Purity ≥99.99% | — |
