the absorbance was in proportion to iron concentration
in the range of 5–400 with a correlation coefficient (R) of 0.9993. The limit of detection
(LOD) and limit of quantitation (LOQ) were 1.5 lg L1 and 5.2 lg L1
, respectively. The relative standard
deviation (RSD) for samples were 1.37– 4.42% (n = 3). Good recoveries of iron were obtained in the range
of 95.4–103.2% in food samples, 96.9–103.6% in water samples and 98.8–102.3% in Certified Reference
Material. The proposed method was rapid, reliable and high-selective for the determination of total iron
in food and water samples.