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The amount of active ingredient in 20 commercially sourced batches of praziquantel (PZQ) tablets was determined using a high-performance liquid chromatography–ultraviolet (HPLC–UV) assay in conjunction with an anthentic, lot of PZQ powder. The general composition of each batch of tablets was also examined by means of 1 H nuclear magnetic resonance (NMR) spectroscopy and the NMR data were subjected...
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