1 Method Summary
After sample digestion, the solution is atomized by air‑acetylene flame, and absorbance is measured at 285.2 nm. Within a specified concentration range, the absorbance of magnesium is proportional to its mass content, and quantification is realized via comparison against the standard calibration series.
2 Scope of Application
This method applies to the determination of magnesium content in sodium bicarbonate.
3 Reference Standard
GB 5009.241-2017 National Food Safety Standard – Determination of Magnesium in Foods
4 Testing Instruments
· Flame Atomic Absorption Spectrophotometer 1 set — Magnesium hollow cathode lamp
