Applications

1. Method Overview

After the sample is digested, lanthanum solution is added as a releasing agent. The sample is atomized by flame in an atomic absorption spectrometer, and the absorbance is measured at 422.7nm. Within a certain concentration range, the absorbance is directly proportional to the calcium content, and quantification is performed by comparison with a standard series.

2. Scope

Determination of calcium in milk powder.

3. References

GB 5009.92-2016 National Food Safety Standard – Determination of calcium in foods.

4. Testing Instruments

· Flame Atomic Absorption Spectrophotometer(include Calcium Hollow Cathode Lamp)

· Air Compressor(Rated Discharge Pressure: 0.3MPa)

· Acetylene Gas(cylinder Purity≥ 99.99%)