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Construction of an Electrode Modified With gallium(III) for Voltammetric Detection of Ovalbumin

Construction of an Electrode Modified With gallium(III) for Voltammetric Detection of Ovalbumin

Kazuharu Sugawara, Makoto Okusawa, Yusaku Takano, Toshihiko Kadoya

Anal Sci. 2014;30(6):649-55.

PMID: 24919669

Abstract:

Electrodes modified with gallium(III) complexes were constructed to detect ovalbumin (OVA). For immobilization of a gallium(III)-nitrilotriacetate (NTA) complex, the electrode was first covered with collagen film. After the amino groups of the film had reacted with isothiocyanobenzyl-NTA, the gallium(III) was then able to combine with the NTA moieties. Another design featured an electrode cast with a gallium(III)-acetylacetonate (AA) complex. The amount of gallium(III) in the NTA complex was equivalent to one-quarter of the gallium(III) that could be utilized from an AA complex. However, the calibration curves of OVA using gallium(III)-NTA and gallium(III)-AA complexes were linear in the ranges of 7.0 × 10(-11) - 3.0 × 10(-9) M and 5.0 × 10(-10) - 8.0 × 10(-9) M, respectively. The gallium(III) on the electrode with NTA complex had high flexibility due to the existence of a spacer between the NTA and the collagen film, and, therefore, the reactivity of the gallium(III) to OVA was superior to that of the gallium(III)-AA complex with no spacer.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP14405437	Gallium(III) acetylacetonate		14405-43-7	Price

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