International Journal of Research in Pharmacy and Pharmaceutical Sciences

International Journal of Research in Pharmacy and Pharmaceutical Sciences


International Journal of Research in Pharmacy and Pharmaceutical Sciences
International Journal of Research in Pharmacy and Pharmaceutical Sciences
Vol. 2, Issue 3 (2017)

Spectrophotometric determination of dimethoate and deltamethrin insecticides in their formulations, environmental and biological samples using cerric (IV) ammonium sulfate


Alaa S Amin, Sayed MN Moalla, Mohammed SS Salama, Amani Ali, Ayman A Gouda

Two simple, sinsitive and accurate spectrophotometric methods have been developed for the determination of two insecticides (dimethoate and deltamethrin) in pure forms, formulations and environmental samples. In this technique we investigated the development of indirect redox spectrophotometric reaction for determination of deltamethrin or dimethoate with known excess of cerric(IV) ammonium sulfate as an oxidizing agent in acidic medium, followed by determination of unreacted cerric (IV) by adding a fixed amount of Amaranth (AM) or Rhodamin 6G (Rh6G) and measuring the absorbance at λmax 520 and 525 nm for AM and Rh6G methods, respectively. The beer’s law was obeyed in the concentration ranges 0.5-4.0 and 0.5-4.5 μg mL-1 for deltamethrin and 0.5-5.0 and 0.5-6.0 μg mL-1 for dimethoate using AM and Rh6G methods, respectively with correlation coefficients ≥ 0.9993. The molar absorptivity and Sandell’s sensitivity, detection and quantification limits were calculated. Intra-day and inter-day accuracy and precision of the methods have been evaluated. No interference was observed from the additives. The proposed methods have been successfully applied for the determination of deltamethrin and dimethoate in its formulations and environmental samples.
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How to cite this article:
Alaa S Amin, Sayed MN Moalla, Mohammed SS Salama, Amani Ali, Ayman A Gouda. Spectrophotometric determination of dimethoate and deltamethrin insecticides in their formulations, environmental and biological samples using cerric (IV) ammonium sulfate. International Journal of Research in Pharmacy and Pharmaceutical Sciences, Volume 2, Issue 3, 2017, Pages 47-56
International Journal of Research in Pharmacy and Pharmaceutical Sciences