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Kucherenko, I.S.; Kucherenko, D. Yu; Soldatkin, O.O.; Lagarde, F.; Dzyadevych, S.V.; Soldatkin, A.P.
Talanta (Oxford), 04/2016, Letnik: 150Journal Article
The paper presents a simple and inexpensive reusable biosensor for determination of the concentration of adenosine-5′-triphosphate (ATP) in aqueous samples. The biosensor is based on a conductometric transducer which contains two pairs of gold interdigitated electrodes. An enzyme hexokinase was immobilized onto one pair of electrodes, and bovine serum albumin-onto another pair (thus, a differential mode of measurement was used). Conditions of hexokinase immobilization on the transducer by cross-linking via glutaraldehyde were optimized. Influence of experimental conditions (concentration of magnesium ions, ionic strength and concentration of the working buffer) on the biosensor work was studied. The reproducibility of biosensor responses and operational stability of the biosensor were checked during one week. Dry storage at −18°C was shown to be the best conditions to store the biosensor. The biosensor was successfully applied for measurements of ATP concentration in pharmaceutical samples. The proposed biosensor may be used in future for determination of ATP and/or glucose in water samples. Display omitted •A conductometric biosensor for determination of adenosine triphosphate was created.•It is based on enzyme hexokinase immobilized on interdigitated planar electrodes.•Quick response, simplicity, and low cost are advantages of the biosensor.•The biosensor can be used in for determination of ATP in water samples.
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