1 方法概要
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 適用範囲
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．器具および試薬
4.1計器設備
4.1.1 Testing Instruments
| いや | 名前 | 量 | 技術要件 | アクセサリー |
| 1 | Atomic Absorption Spectrophotometer (TAS 990) | 1セット | — | Sodium Hollow-Cathode Lamp |
| 2 | 空気圧縮機 | 1セット | 評価された排気圧: 0.3 MPa | — |
| 3 | アセチレン | 1つのシリンダー | Purity ≥99.99% | — |
