A New Spectrophotometric Reagent for Fe(III): 2-(2,3-Dihydroxy-4-oxocyclobut-2-enylidene) Hydrozinecarbothiamide and Its Application in Real Samples

Table 4

Determination of Fe(III) in tap water, cow milk, and human serum.

Sample	Fe(III) (μg·mL^−1)		Recovery (%)
	Added	Found
Tap water	10.45	9.81 ± 0. 7	93.87
Cow milk (1.5% fat)	8.1	7.56 ± 0. 4	93.33
Cow milk (2.5% fat)	8.10	7.29 ± 0. 6	97.40
Human serum	13.50	12.13 ± 0. 7	89.85