Spectrophotometric determination of pipazethate HCl, dextromethorphan HBr and drotaverine HCl in their pharmaceutical preparations

Extractive-Spectrophotometric Methods for Determination of Alzheimer’s Drug in Pharmaceutical Formulations and in Biological Samples Using Sulphonphthalein Acid Dyes

“…Year 2016 | Volume 4 | Issue 1 | Page [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] Scientific, UK. A centrifuge Model 90-1 with speed 50000 rpm (USA) was used to carry out for the spiked plasma samples.…”

“…The spectrophotometric method is simpler, rapid, sensitive, selective and inexpensive. Spectrophotometric methods were reported [16,17] and by extraction [18,19].Bromocressol green (BCG), bromophenol blue (BPB) and bromothymol blue (BTB) are known to yield an ion pair complex, which are applied in the determination of many pharmaceutical compounds [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36].…”

New Potentiometric and Spectrophotometric Methods for the Determination of Dextromethorphan in Pharmaceutical Preparations

“…2 Different spectrophotometric methods have been reported for the determination of DXM in both the bulk drug and the dosage forms. [3][4][5][6][7][8][9][10] The first and second-derivative technique UV spectrophotometry, [11][12][13] thin-layer chromatography, New, simple and convenient potentiometric and spectrophotometric methods are described for the determination of dextromethorphan hydrobromide (DXM) in pharmaceutical preparations. The potentiometric technique is based on developing a potentiometric sensor incorporating the dextromethorphan tetrakis(p-chlorophenyl)borate ion-pair complex as an electroactive species in a plasticized PVC matrix membrane with o-nitophenyl octyl ether or dioctyl phthalate.…”

Molecularly imprinted polymer cartridges coupled on-line with high performance liquid chromatography for simple and rapid analysis of dextromethorphan in human plasma samples

“…Dextromethorphan is also being investigated as a possible treatment for neuropathic pain and pain associated with fibromyalgia [1]. The drug has been quantified using different methods such as LC-MS-MS [2], GC-MS [3], HPLC [4,6], potentiometric sensor [5], spectrophotometry [7], capillary electrophoresis [8], and fluorimetry [9].…”