1 방법 개요
After the sample is digested, lanthanum solution is added as a releasing agent. The sample is atomized in an atomic‑absorption flame, and the absorbance is measured at 422.7 nm. Within a certain concentration range, the absorbance is proportional to the calcium content, and quantification is performed by comparison with the standard series.
2. 적용 범위
This method is applicable to the determination of calcium in milk powder.
3 Reference Basis
GB 5009.92‑2016, National Food Safety Standard — Determination of Calcium in Foods
4. 기기 및 시약
4.1 기기 및 장비
4.1.1 Testing Instruments
| 아니야 | 이름 | 수량 | 기술 요구사항 | 부속품 |
|---|---|---|---|---|
| 1 | 불꽃 원자 흡수 분광광계는 | 1 세트 | — | Calcium Hollow‑Cathode Lamp |
| 2 | 공기 압축기 | 1 세트 | Rated exhaust pressure: 0.3 MPa | — |
| 3 | 아세틸렌 | 1 실린더 | Purity ≥99.99% | — |
