1 Panoramica del metodo
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 Ambito di applicazione
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 Strumenti e reagenti
4.1 Strumenti e attrezzature
4.1.1 Testing Instruments
| - No, no, no. | Nome | Quantità | Requisito tecnico | Accessori |
|---|---|---|---|---|
| 1 | Spettrofotometro di assorbimento atomico di fiamma | 1 set | — | Calcium Hollow‑Cathode Lamp |
| 2 | compressore aria | 1 set | Rated exhaust pressure: 0.3 MPa | — |
| 3 | Acetilene | 1 cilindro | Purity ≥99.99% | — |
