1 Resumo do Método
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. Âmbito de aplicação
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 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 | — | Potassium Hollow‑Cathode Lamp |
| 2 | Compressor de ar | 1 conjunto | Rated exhaust pressure: 0.3 MPa | — |
| 3 | Acetileno | 1 cilindro | Purity ≥99.99% | — |
