Kinetic Spectrophotometric Determination of Gemifloxacin Mesylate and Moxifloxacin Hydrochloride in Pharmaceutical Preparations Using 4-Chloro-7-nitrobenzo-2-oxa-1,3-diazole

Table 2

Comparison between the previously mentioned spectrophotometric methods for determination of MOX.

Reagent	𝜆max (nm)	Concentration range; (𝜇g mL^−1)	Molar absorptivity; L mol^−1 cm^−1	Reference
Ammonium reineckate	525	100–1100	1.075×10^3	[12]
UV spectrophotometry HCl (0.1 N)	295	2.0–25		[30]
UV spectrophotometry	290	1.0–12		[31]
Crotonaldehyde/dichlone	648	3.0–48
Folin-Ciocalteu’s/Na2CO3	750	5.0–40
UV spectrophotometry				[33]
HCl (0.1 N) (pH 1.2)	296	1.0–12	4.63×10^4
Phosphate buffer (pH 7.4)	289	1.0–14	4.08×10^4
2,3,5,6-Tetrachloro-1,4-benzoquinone/acetaldehyde				[34]
Initial rate	652	5.0–100
Fixed time	652	15–150
Bromocresol green (BCG)	415.8	2.0–20		[35]
Fe^3+/1,10-phenanthroline	510	0.8–6.0	6.61×10^4	[36]
Fe^3+/2,2′ bipyridyl	520	0.8–4.0	8.5×10^4
Bismuth (III) tetraiodide	462	16–96	4.5×10^3
NBD-Cl	464	2.0–12	3.48535×10^4	Present work