Table 8 Comparison of the current work with some reported spectrophotometric methods
Items | Proposed method | Reported method [3] | Reported method [4] | Reported method [5] | Reported method [6] |
|---|---|---|---|---|---|
λmax | 550 and 460 nm for method I and II | 560 and 600 nm for method I and II | 520.5 and 450.6 nm for method I and II | 550 nm | 449 nm |
Reagent | p-chloranil and 2,3-dichloro-5,6-dicyano-p-benzoquinone | Vanillin or Para dimethyl amino Benzaldehyde | Sodium meta periodate and Folin reagent | Gold (III) chloride | 1,2-naphthoquinone-4-sulphonate |
Linear range | 30–320 and 10–80 µg mL − 1 | 1–5 µg/mL for method I and 10–50 µg/mL for method II | (4.0–20) µg/mL for method I, (16–48) µg/mL for method II | 5–80 µg/mL | 5–40 µg mL − 1 |
LOQ (µg mL −1 ) | 14.84 and 4.75 | Not reported | Not reported | 7.6170 and 34.7446 | 0.06 |
LOQ (µg mL −1 ) | 4.89 and 1.56 | Not reported | Not reported | 2.2837 and 10.3723 | 0.02 |
Application | Capsules and content uniformity testing | Capsules | Capsules | Tablets | Capsules |