1 Tổng quan phương pháp
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. Phạm vi áp dụng
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. 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 | — | Potassium Hollow‑Cathode Lamp |
| 2 | Máy nén khí | 1 bộ | Rated exhaust pressure: 0.3 MPa | — |
| 3 | Acetylen | 1 xi lanh | Purity ≥99.99% | — |
