1 Gambaran Umum Metode
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. Ruang Lingkup Penerapan
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 Instrumen dan Reagen
4.1 Instrumen dan Peralatan
4.1.1 Testing Instruments
| Tidak, tidak. | Nama | Kuantitas | Persyaratan Teknis | Aksesoris |
|---|---|---|---|---|
| 1 | Atomic Absorption Spectrophotometer (TAS‑990) | 1 set | — | Potassium Hollow‑Cathode Lamp |
| 2 | Kompresor Udara | 1 set | Rated exhaust pressure: 0.3 MPa | — |
| 3 | Acetilena | 1 silinder | Purity ≥99.99% | — |
