Determination of salicylic acid in pharmaceutical formulations and foods by differential-pulse voltammetry using a glassy carbon electrode
- 1 January 1989
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in The Analyst
- Vol. 114 (8) , 943-945
- https://doi.org/10.1039/an9891400943
Abstract
A simple and rapid voltammetric method for the determination of salicylic acid in pharmaceutical preparations and foods has been developed. The sample was extracted using either diethyl ether or ethanol-diethyl ether and then back-extracted into 0.015 M disodium hydrogen phosphate solution. The peak current was measured using a glassy carbon electrode at 0.85 V. The working range was 0–25 p.p.m. The average recovery for ointment was 99% with a standard deviation of 5.0%. Results are reported for eight different pharmaceutical formulations.Keywords
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