PMID- 17409559 OWN - NLM STAT- MEDLINE DCOM- 20070606 LR - 20190706 IS - 0009-2363 (Print) IS - 0009-2363 (Linking) VI - 55 IP - 4 DP - 2007 Apr TI - Spectrophotometric determination of dopaminergic drugs used for Parkinson's disease, cabergoline and ropinirole, in pharmaceutical preparations. PG - 629-31 AB - Simple and reproducible spectrophotometric methods have been developed for determination of dopaminergic drugs used for Parkinson's disease, cabergoline (CAB) and ropinirole hydrochloride (ROP), in pharmaceutical preparations. The methods are based on the reactions between the studied drug substances and ion-pair agents [methyl orange (MO), bromocresol green (BCG) and bromophenol blue (BPB)] producing yellow colored ion-pair complexes in acidic buffers, after extracting in dichloromethane, which are spectrophotometrically determined at the appropriate wavelength of ion-pair complexes. Beer's law was obeyed within the concentration range from 1.0 to 35 microg ml(-1). The developed methods were applied successfully for the determination of these drugs in tablets. FAU - Onal, Armagan AU - Onal A AD - Istanbul University, Faculty of Pharmacy, Department of Analytical Chemistry, Istanbul, Turkey. armaganozkul@yahoo.com FAU - Caglar, Sena AU - Caglar S LA - eng PT - Journal Article PL - Japan TA - Chem Pharm Bull (Tokyo) JT - Chemical & pharmaceutical bulletin JID - 0377775 RN - 0 (Dopamine Agents) RN - 0 (Ergolines) RN - 0 (Indoles) RN - 0 (Pharmaceutical Preparations) RN - 030PYR8953 (ropinirole) RN - LL60K9J05T (Cabergoline) SB - IM MH - Cabergoline MH - Dopamine Agents/*analysis/therapeutic use MH - Ergolines/*analysis/therapeutic use MH - Humans MH - Hydrogen-Ion Concentration MH - Indoles/*analysis/therapeutic use MH - Parkinson Disease/*drug therapy MH - Pharmaceutical Preparations/*chemistry MH - Reproducibility of Results MH - Sensitivity and Specificity EDAT- 2007/04/06 09:00 MHDA- 2007/06/07 09:00 CRDT- 2007/04/06 09:00 PHST- 2007/04/06 09:00 [pubmed] PHST- 2007/06/07 09:00 [medline] PHST- 2007/04/06 09:00 [entrez] AID - JST.JSTAGE/cpb/55.629 [pii] AID - 10.1248/cpb.55.629 [doi] PST - ppublish SO - Chem Pharm Bull (Tokyo). 2007 Apr;55(4):629-31. doi: 10.1248/cpb.55.629.