1 Обзор метода
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. Область применения
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. Приборы и реагенты
4.1 Инструменты и оборудование
4.1.1 Testing Instruments
| Нет, нет. | Имя | Количество | Технические требования | Аксессуары |
|---|---|---|---|---|
| 1 | Atomic Absorption Spectrophotometer (TAS‑990) | 1 набор | — | Potassium Hollow‑Cathode Lamp |
| 2 | Воздушный компрессор | 1 набор | Rated exhaust pressure: 0.3 MPa | — |
| 3 | ацетилен | 1 цилиндр | Purity ≥99.99% | — |
