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A single novel PVC membrane for dual determination of sulphadimethoxine and malachite green in aquatic environment

By Fatma I. Khattab, Safa'a M. Riad, Mamdouh R. Rezk, Mohamed K. Abd El-Rahman and Hoda M. Marzouk


A novel ion-pair of a quaternary ammonium compound; malachite green (MG), and an anionic drug sulphadimethoxine sodium (SDM) was prepared. The developed ion pair was incorporated into poly (vinyl chloride)-based membrane sensors for the dual quantification of sulphadimethoxine (sensor 1) and malachite green (sensor 2) in aquatic environment. Linear responses of SDM and MG were obtained within a concentration range of 10−5–10−2 and 10−5–10−3 M, respectively. The slopes of −29.8 ± 0.31 and 35.5 ± 0.20 mV/decade were obtained over pH range of 6–8 and 4–8 using sensors 1 and 2, in order. The proposed sensors displayed useful analytical characteristics for determination of SDM in its pharmaceutical formulation and in aquatic environment with average recoveries of 100.92 ± 0.19 and 102.47 ± 4.63, respectively. The recovery of MG in aquatic environment was 101.32 ± 3.64

Topics: Aquatic environment, Malachite green, Poly (vinyl chloride), Potentiometry, Sulphadimethoxine sodium, Chemistry, QD1-999
Publisher: Elsevier
Year: 2015
DOI identifier: 10.1016/j.arabjc.2013.11.033
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