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

Table 1

Analytical characteristics of the proposed method and comparison with some other spectrophotometric methods.

Reagent	Condition pH	LDR; (μg·mL^−1)	LOD; (μg·mL^−1)	𝜆max; (nm)	Reference
2-(2,3-Dihydroxy-4-oxocyclobut-2-enylidene) hydrozinecarbothiamide	3, HCl	0.27–33.50	0.08	465	This work
Morin	—	0.4–15	0.36	412	[28]
2,6-Dihydroxy benzoic acid	3, Formic acid/sodium formate	3.24–97.2	0.4	560	[4]
2-Ethanolimino-2-pentylidino-4-one	3.5, HNO3	2–17	Not reported	440	[29]
thiocyanate and cetyltrimethylammonium bromide	3-4 HNO3	0–6	Not reported	474	[30]
2-Carboethoxy-1,3-indandione	1.5–3.5, HCl	0.27–27.92	0.04	500	[31]