Iron and Zinc Determination in Dietary Supplements by Flame Atomic Absorption Spectrophotometry

Recent studies have demonstrated that 30% of the world’s population suffers anemia, half cases are related to iron deficiency, and most common treatment is use supplementation. In this framework, zinc determination from different dietary supplements was performed by flame atomic absorption spectrophotometry. Concerning dissolution supplements, direct acid dissolution, wet digestion, microwave digestion (MW) techniques were used for sample preparation. The recovery results MW technique appropriate all with highest metal yields. Moreover, method validation parameters referred a linear range 0.1-4 mg L-1 regression coefficient (R2) 0.9998 ± 0.002, while it 0.01-1 (R2 = 0.9997 0.003). limit detection quantification values calculated as 0.03 0.09 0.01 0.02 zinc, respectively. accuracy evaluated % yield which, respectively, resulted in an oscillate 99.2% 102%, 99.4% 100.4% investigated supplements. precision determined intra-day inter-day relative standard deviation <2.0%.