Venlafaxine Determination in Pharmaceutical Formulation and Serum by Ion-Selective Electrodes.

Abstract:

BACKGROUND:The application of an ion selective technique for the determination of analyte concentrations is considered one of the most economical techniques for quality control purposes. OBJECTIVE:To elaborate and investigate the construction and general performance characteristics of potentiometric PVC membrane sensors for venlafaxine cation (Ven+). METHOD:The sensors are based on the use of the ion association complexes of the venlafaxine cation with phosphotungstate (PT) and silicotungstate (ST) counter anions as ion exchange sites in the plasticized PVC matrix. They are characterized by potentiometric and conductimetric measurements, performed under various conditions. RESULTS:The electrodes showed a fast (response time around 15 s), stable (life span 45 days) and linear (r2 0.995) response for venlafaxine over the concentration range of 5x10-5 - 1x10-2 M venlafaxine hydrochloride. The solubility product of the ion pair and the formation of the precipitation reaction leading to the ion pair, were determined conductimetrically. The electrodes were found to be very selective, precise (RSD < 1%) and applicable to the potentiometric determination of venlafaxine hydrochloride in pure solutions or in pharmaceutical preparation and in biological fluid (serum), without any interference. Validation of the method shows the suitability of the proposed electrodes for use in the quality assessment of venlafaxine hydrochloride. CONCLUSION:Using only a pH meter in combination with the selective electrodes, drug substance or drug product could be determined accurately in a few seconds. In addition, the in-house made electrodes were tested to monitor venlafaxine in serum. Acceptable results were achieved using the standard addition technique.

journal_name

Curr Pharm Des

authors

Mansour MF,El-Moety MMA,El Kady EF,El Guindi NM,Schepdael AV,Aly SME

doi

10.2174/1381612824666180727112730

subject

Has Abstract

pub_date

2018-01-01 00:00:00

pages

2625-2630

issue

22

eissn

1381-6128

issn

1873-4286

pii

CPD-EPUB-91976

journal_volume

24

pub_type

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