UV spectrophotometry of Canopus from Gemini XI

Basic UV/Visible Spectrophotometry

Determination of diclofenac released from suppositories using UV spectrophotometry, spectra derivative spectrophotometry and HPLC.

Spectrophotometric method is often recommended in dissolution testing of not only tablets or capsules but also suppositories. Dissolution rate of diclofenac sodium was studied using a pharmacopoeial flow-through apparatus and pH 7.3 buffer. For two lipophilic suppository bases (Witepsol W-32 and H-19) dissolution rate was overestimated with the spectrophotometric zero-order method in comparison...

UV spectrophotometry for monitoring toxic gases

The need for gas compound measurement concerns overall three domains: environmental monitoring, emission measurement and risk assessment. These fields are different because of concentration range (from 10–3 to thousands mg.m–3). A fast technique has been developed based on UV spectrophotometry. Simple robust optics and absence of interference from water vapour and carbon dioxide are two of the ...

Determination of Triiodide Ion Concentration Using UV-Visible Spectrophotometry†

The concentration of iodine species can be measured using several different analysis methods. One of the most wellknown methods involves iodine titration with a thiosulfate solution. Total iodine can be analyzed using spectrometry, such as inductively coupled plasma-atomic emission spectrometry (ICP-AES), atomic absorption spectrometry (AAS) and inductively coupled plasma-mass spectrometry (ICP...

Validated Determination of Meloxicam in Tablets by Using UV Spectrophotometry

Meloxicam (MEL) (4-hydroxy-2-methyl-N-(5-methyl-2-thiazoly)-2H1,2-benzo-thiazine-3-carboxamide-1,1dioxide) (C14H13N3O4S2) (Figure 1) is a non-steroidal anti-inflammatory drug (NSAID) 1,2. MEL is a novel NSAIDs with a favorable COX-2 (cyclooxgenase-2): COX-1 (cyclooxgenase-1) selectivity has also been shown to have potent anti-inflammatory effects 3,4. Because of very low solubility of MEL in ac...