1 方法概要
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 適用範囲
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．器具および試薬
4.1計器設備
4.1.1 Testing Instruments
| いや | 名前 | 量 | 技術要件 | アクセサリー |
|---|---|---|---|---|
| 1 | 火焰 原子 吸収 分光 光計 | 1セット | — | Calcium Hollow‑Cathode Lamp |
| 2 | 空気圧縮機 | 1セット | Rated exhaust pressure: 0.3 MPa | — |
| 3 | アセチレン | 1つのシリンダー | Purity ≥99.99% | — |
