| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fructose sensor that can be easily operated, is less expensive and is practical, and has high selectivity and sensitivity. <P>SOLUTION: A gold electrode (12) where fructose dehydrogenases (FDH) is immobilized by utilizing the combination of gold and cysteamine (Au-S), a platinum counter electrode (11), and cobalt phenanthroline complex (Co(phen)<SB>3</SB><SP>2+</SP>) solution 5 are used as a fructose concentration sensor. Preferably, further as a reference electrode, an Ag/AgCl electrode 13 is used. The fructose concentration sensor has an advantage where the Co(phen)<SB>3</SB><SP>2+</SP>can be easily adjusted, reversible oxidation reduction is enabled, and oxidation reduction potential is the lowest among other metal complexes with phenanthroline as ligand at relatively low potential. When an oxidation reduction voltage is low, there is less influence of interfering substances such as an ancorbic acid that coexists in an actual sample, and the background current of a capacity current is small, thus manufacturing the fructose concentration sensor having high selectivity and sensitivity. <P>COPYRIGHT: (C)2003,JPO |
