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H. G. Ramjit, M. M. Singh and A. B. Coddington, “Gas Chromatographic/Mass Spectrometric Analysis of Methyl Methanesulphonate and Ethyl Methanesulphonate in the Bismesylate Salt of DPI 201-106, a Positive Inotropic Agent for the Treatment of Heart Failure,” Journal of Mass Spectrometry, Vol. 31, No. 8, 1996, pp. 867-872.
http://dx.doi.org/10.1002/(SICI)1096-9888(199608)31:8<867::AID-JMS362>3.0.CO;2-Q

has been cited by the following article:

• TITLE: Low Level Determination of Genotoxic Impurity in Deferasirox Formulation

  AUTHORS: Pravish Kumar Tiwari, Padmakar Sathe, Navin Devadiga

  KEYWORDS: Deferasirox; Genotoxic; 4-Hydrazinobenzoic Acid; HPLC

  JOURNAL NAME: Journal of Analytical Sciences, Methods and Instrumentation, Vol.3 No.4, October 22, 2013

  ABSTRACT: 4-hydrazinobenzoic acid has been highlighted as one of the potential genotoxic impurities (PGIs). A sensitive HPLC method was developed and validated for the determination of 4-hydrazino benzoic acid in Deferasirox Tablet. HPLC method on Zorbax SB C18 column (250 × 4.6 mm i.d.), 5 μm, with UV Detector was used. The proposed method was cost effective, specific, linear, accurate, rugged and precise. The calibration curves showed good linearity over the concentration range of 0.5 μg/ml to 1.5 μg/ml with respect to the sample. The correlation coefficient was 0.999. Excellent recoveries of 102% were obtained at the level 0.5 μg/ml.