Sensor array for carbohydrates and amino acids based on electrocatalytic modified electrodes
- New Mexico State Univ., Las Cruces (United States)
The operation and advantages of a four-element chemical sensor array, comprising carbon paste electrodes doped with different metal oxide catalysts, are described. The Cu[sub 2]O-, RuO[sub 2]-, NiO-, and CoO-modified surfaces exhibit distinctly different catalytic properties toward carbohydrates or amino acids. By coupling the unique sensor array response patterns with various statistical regression techniques, it is possible to determine individual carbohydrates or amino acids in different sample mixtures. For two- and three-component mixtures,the partial least squares (PLS) calibration method yields an average relative prediction error of 2.3%. Such multicomponent quantification is accomplished in amperometric flow injection experiments. The response is highly stable and linear, as desired by the mathematical models. 13 refs., 7 figs., 2 tabs.
- OSTI ID:
- 5833574
- Journal Information:
- Analytical Chemistry (Washington); (United States), Journal Name: Analytical Chemistry (Washington); (United States) Vol. 65:3; ISSN 0003-2700; ISSN ANCHAM
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400102 -- Chemical & Spectral Procedures
400400* -- Electrochemistry
AMINO ACIDS
CALIBRATION
CARBOHYDRATES
CARBOXYLIC ACIDS
CATALYSTS
CHALCOGENIDES
COBALT COMPOUNDS
COBALT OXIDES
COPPER COMPOUNDS
COPPER OXIDES
DATA
ELECTRODES
EVALUATION
EXPERIMENTAL DATA
INFORMATION
LEAST SQUARE FIT
MATHEMATICS
MAXIMUM-LIKELIHOOD FIT
NICKEL COMPOUNDS
NICKEL OXIDES
NUMERICAL DATA
NUMERICAL SOLUTION
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
REGRESSION ANALYSIS
RUTHENIUM COMPOUNDS
RUTHENIUM OXIDES
STATISTICS
THEORETICAL DATA
TRANSITION ELEMENT COMPOUNDS