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Monitoring of reducing sugars by flow-injection analysis using p-hydroxybenzoic acid hydrazide

1994; Elsevier BV; Volume: 285; Issue: 1-2 Linguagem: Inglês

10.1016/0003-2670(94)85001-1

1873-4324

Peter Hartmann, Stephen J. Haswell, M. Grasserbauer,

Biosensors and Analytical Detection

In this work, p-hydroxybenzoic acid hydrazide has been used as a reagent to determine reducing sugars using flow-injection volume, flows and reagent concentration were examined for their optimum conditions. Systems catalysed by bismuth for low analyte concentrations and non-catalysed for higher levels, containing only a single sugar (sampling frequency 60−80 h−1) and a system with a longer residence time (sampling frequency 30 h−1) in which the different responses of various sugars can be minimised, are described. Samples (fruits and beverages) measured with the latter system in the calibration range 0.08−0.6 g/1 gave a typical R.S.D. of 2%.