Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 247, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2020.119107
Keywords
CdTe quantum dots; Thioglycolic acid; Salbutamol; Fluorescent probe
Categories
Funding
- National Natural Science Foundation of China [21605063]
- Youth Fund of the Jiangxi Provincial Science and Technology Department [2016BAB51486]
- Breeding Program of the Jiangxi Provincial Science and Technology Department [20181BBF68013]
- Major research and development project of the Jiangxi Provincial Science and Technology Department [20202BBG73034]
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A highly fluorescent water-soluble CdTe quantum dots stabilized with thioglycolic acid were synthesized for the selective determination of salbutamol. The CdTe QDs showed high sensitivity towards salbutamol and static quenching mechanism. The proposed method was successfully applied for the accurate determination of salbutamol in pig urine samples.
In this paper, a highly fluorescent water-soluble CdTe quantum dots (CdTe QDs) stabilized with thioglycolic acid (TGA) were synthesized for the quantitative and selective determination of salbutamol (SAL). When ten different of 2.09 x 10(-6) mol L-1 alpha-2 adrenoceptor agonist were added to 4.38 x 10(-4) mol L-1 CdTe QDs solution, the fluorescence signal of the CdTe QDs quenched obviously by SAL with 57.32% and 0.815% - 7.00% for other nine kinds of veterinary medicine, such as tulobuterol, fenoterol, phenylethanamine A, simatero, penbutolol, clenbuterol, ractopamine, terbutaline and clorprenaline. The result shows that the CdTe QDs is highly sensitive sensor for SAL. The quenching mechanism has been investigated by absorption spectroscopy and KSV at different temperatures, and shew a static quenching process than dynamic quenching. Under the optimal conditions, respectively the straight line equation (F-0/F = 0.1491 x 10(6) C + 1.3078) was found between the relative fluorescence intensity and the concentration of SAL was in the range of 6.27 x 10(-8) to 2.09 x 10(-7) mol L-1, and the limit of detection was 4.2 x 10(-8) mol L-1. The proposed method has been applied to the determination of SAL in pig urine samples. (C) 2020 Elsevier B.V. All rights reserved.
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