The iron test (Iron (Fe), by Atomic Absorption Spectrophotometer using Flame and GFA modes) is used to measure iron levels in biological samples such as blood or urine. This analysis relies on flame atomic absorption and graphite furnace atomization techniques, providing high measurement accuracy. It is an important tool for assessing health status, as it helps detect iron deficiency, which can lead to anemia, as well as identify iron overload conditions that may indicate disorders such as hemochromatosis. The results of this test assist doctors in making informed decisions regarding diagnosis and treatment.