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Main purpose of the work is assembling, testing and optimizing new disposable amperometric biosensors to analyze substances in different application fields as agribusiness, clinical chemistry and environment protection.Many kinds of modified electrodes have been prepared and tested to build portable devices to analyze quickly many analytes, in a simple and cost-effective manner.Bare electrodes of...
The analysis of the ascorbic acid (vitamin C; A.A.) contained in some foodstuff and pharmaceutical samples was performed by a new microcalorimetric method. It uses the oxidation of the vitamin C catalysed by the enzyme ascorbate oxidase (A.O.), which gets the specificity of the reaction. The calibration curve was built under the following operative conditions: 25.00 o C, pH 5.6, [A.O.]=11...
The free fatty acid (FFA) content together with the lipase activity control can be considered as useful indexes of good quality and correct storage of food, especially for milk. The quantitative analysis of FFA in different kinds of milk has been performed by a potentiometric method, using a new extractive methodology outlined herein. The lipase activity has been controlled by a sensitive calorimetric...
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