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- W2034603983 abstract "This work refers to a very easy to implementate flow injection system with potentiometric detection for l-glutamate determination in food samples. The proposed procedure is based on measurement of carbon dioxide produced by decarboxylation of l-glutamate catalyzed by l-glutamate decarboxylase (E.C. 4.1.1.1.5) from Cucurbita maxima (pumpkin). The FI potentiometric system includes an enzymatic reactor with a length of 8 cm and thickness of 5 mm packed with 200 mg of a C. maxima outer layer cut in to small pieces. The proposed procedure allowed l-glutamate determinations in the concentration interval of 10−100 mmol L-1 for an injected sample volume of 50 μL. A phosphate buffer (0.1 mol L-1, pH 5.5) solution flowing at 1.4 mL min-1 was used as the carrier solution in the system. The results obtained in the analysis of food samples revealed a relative error lower than 5% when compared with those provided by the spectrophometric reference procedure. The immobilized reactor retained its initial activity for 21 days. It was possible to measure 40 samples/h with the flow system proposed. Keywords: l-Glutamate; glutamate decarboxylase; potentiometry; flow analysis; pumpkin; Cucurbita maxima" @default.
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- W2034603983 date "2003-10-25" @default.
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- W2034603983 title "Simple and Inexpensive Flow <scp>l</scp>-Glutamate Determination Using Pumpkin Tissue" @default.
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- W2034603983 doi "https://doi.org/10.1021/jf0344791" @default.
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