แอปพลิเคชัน

1 ภาพรวมวิธี
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 ขอบเขตการใช้งาน
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. อุปกรณ์และสารเคมี

4.1 เครื่องมือและอุปกรณ์

4.1.1 Testing Instruments