Abstract
AbstractAn amperometric enzyme electrode for the determination of L‐glutamine was developed. The probe consisted of a platinum electrode that senses hydrogen peroxide produced from the reactions catalyzed by glutaminase and glutamate oxidase, which are co‐immobilized on a preactivated Immobilon‐AV Affinity membrane. Protective membranes eliminated interferences from L‐glutamate and most compounds electroactive at a similar potential. The response of the probe was linear over the concentration range 1 × 10−6 M to 7.5 × 10−4 M. L‐Glutamine in serum samples obtained from healthy volunteers was determined using the probe, and the results correlated well with previously reported values.
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