Kamboj S, Sharma D, Nair AB, Kamboj S, Sharma RK, Ali J, Pramod K, Ansari SH. Simple spectrophotometric method for estimation of disodium edetate in topical gel formulations.
Pharm Methods 2013;
2:148-51. [PMID:
23781446 PMCID:
PMC3658051 DOI:
10.4103/2229-4708.84448]
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Abstract
A simple, sensitive, cost-effective and reproducible UV-spectrophotometric method has been developed and validated for the estimation of disodium edetate in topical gel formulations. Solution of disodium edetate reacts with ferric chloride to form complex in 0.1 N HCl giving λmax at 270 nm. Beer's law was obeyed in the concentration range of 5-50 μg/mL (r (2)= 0.9997). The limit of detection and limit of quantitation were found to be 1.190 and 3.608 μg/mL, respectively. The results show that the procedure is accurate, precise, and reproducible (relative standard deviation < 1%), while being simple and less time consuming. The study concluded that the UV-spectrophotometric method could be used for the quantification of disodium edetate in pure form as well as in pharmaceutical formulations.
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