Electroanalytical determination of codeine in pharmaceutical preparations

• Type: Article in International Scientific Journal
• Date: 2002

Authors

Garrido, JMPJ (Author) Other; Delerue Matos, C (Author) Other; Borges, F (Author) FFUP; Macedo, TRA (Author) Other; Oliveira Brett, AM (Author) Other

Journal

Title: Analytical Letters

Vol. 35

ISSN: 0003-2719

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 17 Citations

Scopus - 18 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: P-000-QV7

Abstract (EN): A square wave voltammetric (SWV) method and a flow injection analysis system with electrochemical detection (FIA-EC) using a glassy carbon electrode were evaluated for the determination of codeine in pharmaceutical preparations. The interference of several compounds, such as acetaminophen, guaiacol, parabens, ephedrine, acetylsalicylic acid and caffeine, that usually appear associated with codeine pharmaceutical preparations was studied. It was verified that these electroanalytical methods could not be used with acetaminophen present in the formulations and that with guaiacol, parabens or ephedrine present the use of the FIA-EC ystem was impracticable. A detection limit of 5 mumol L-1 and a linear calibration range from 40 to 140 mumol L-1 was obtained with the SWV method. For the flow injection analysis procedure a linear calibration range was obtained from 7 to 50 mumol L-1 with a detection limit of 3 mumol L-1 and the FIA-EC system allowed a sampling rate of 115 samples per hour. The results obtained by the two methods, SWV and FIA-EC, were compared with those obtained using reference methods and demonstrated good agreement, with relative deviations lower than 4%.

Language: English

Type (Professor's evaluation): Scientific