By Harold H Trimm
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1% TFA in ACN. 6 mm, at 30°C) was used for the separation and quantitation of the AMG 517 impurities. Two different gradients with different flow rates were employed for the separation of AMG 517 and N-acetyl benzothiazole (see Table 1). A UV detection wavelength of 254 nm and an injection volume of 30 µL were used in the analysis of both compounds. Table 1. Gradient conditions used for the HPLC-UV and LC-MS analyses of AMG 517 and N-acetyl benzothiazole. A Multidisciplinary Investigation to Determine 31 LC-MS LC-MS experiments with accurate mass determination via high resolution mass spectrometry were performed using an Agilent 1100 HPLC (configured with a diode array UV detector) interfaced with a Waters (Milford, Mass, USA) Micromass Q-Tof Ultima API quadrupole time-of-flight mass spectrometer.
9, pp. 2296–2309, 2004. Selective Spectrophotometric and Spectrofluorometric Methods for the Determination of Amantadine Hydrochloride in Capsules and Plasma via Derivatization with 1,2Naphthoquinone-4-sulphonate Ashraf M. Mahmoud, Nasr Y. Khalil, Ibrahim A. Darwish and Tarek Aboul-Fadl Abstract New selective and sensitive spectrophotometric and spectrofluorometric methods have been developed and validated for the determination of amantadine Selective Spectrophotometric and Spectrofluorometric 47 hydrochloride (AMD) in capsules and plasma.
The spectrofluorometric method involved the reduction of the product with potassium borohydride, and the subsequent measurement of the formed fluorescent reduced AMD-NQS product at 382 nm after excitation at 293 nm. The variables that affected the reaction were carefully studied and optimized. 05–10 µg mL−1 for the spectrophotometric and spectrofluorometric methods, respectively. 04%. Both methods were successfully applied to the determination of AMD in capsules. 2%. The results obtained by the proposed methods were comparable with those obtained by the official method.