A rapid and sensitive assay for determination of doxycycline using thioglycolic acid-capped cadmium telluride quantum dots.

A rapid and sensitive assay for determination of doxycycline using thioglycolic acid-capped cadmium telluride quantum dots.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy (2015-07-24)

Javad Tashkhourian, Ghodratollah Absalan, Marzieh Jafari, Saber Zare

PMID26204505

ABSTRACT

A rapid, simple and inexpensive spectrofluorimetric sensor for determination of doxycycline based on its interaction with thioglycolic acid-capped cadmium telluride quantum dots (TGA/CdTe QDs) has been developed. Under the optimum experimental conditions, the sensor exhibited a fast response time of <10s. The results revealed that doxycycline could quench the fluorescence of TGA/CdTe QDs via electron transfer from the QDs to doxycycline through a dynamic quenching mechanism. The sensor permitted determination of doxycycline in a concentration range of 1.9×10(-6)-6.1×10(-5)molL(-1) with a detection limit of 1.1×10(-7)molL(-1). The sensor was applied for determination of doxycycline in honey and human serum samples.

MATERIALS

Product Number

Brand

Product Description

03-2910

Sigma-Aldrich

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609765

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Sodium borohydride, granular, 99.99% trace metals basis

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Phosphoric acid, ≥85 wt. % in H₂O, ≥99.999% trace metals basis

295426

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Sodium borohydride, granular, 10-40 mesh, 98%

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Phosphoric acid, 85 wt. % in H₂O, 99.99% trace metals basis

466123

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Sigma-Aldrich

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Sigma-Aldrich

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