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A potentiometric flow-injection method, using a gas-diffusion cell, is described for the determination of total volatile basic nitrogen (TVB-N) in seafood products. The method was based on the change of the potential of a tungsten oxide electrode when volatile basic compounds, liberated from the fish extract sample, diffuses via a permeable membrane into a phosphate buffer acceptor stream and locally...
A flow-injection method for measuring the peroxide value (PV, mequiv. O 2 kg −1 ) in edible oils is described. The technique is based on spectrophotometric monitoring at 660nm of methylene blue (MB), generated from leucomethylene blue (LMB) oxidation with peroxides present in oil samples. After being optimized, the method was validated in terms of linearity, precision sensitivity and...
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