1 方法概要
The test portion is heated and dissolved in a quartz beaker with mixed sulfuric‑phosphoric acid. After dilution with water, the absorbance of potassium is measured at a wavelength of 766.5 nm on an atomic absorption spectrophotometer using an air‑acetylene flame. Within a certain concentration range, the absorbance of potassium is proportional to its content, and quantification is performed by comparison with the standard series.
2 適用範囲
This method is applicable to the determination of potassium oxide content in alumina powder.
3 Reference Basis
GB/T 6609.6‑2018, Methods for chemical analysis and physical property testing of alumina — Part 6: Determination of potassium oxide content
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 | — | Potassium Hollow‑Cathode Lamp |
| 2 | 空気圧縮機 | 1セット | Rated exhaust pressure: 0.3 MPa | — |
| 3 | アセチレン | 1つのシリンダー | Purity ≥99.99% | — |
