Citation: LI Yun, LI Gang, LEI Ke-Lin, LI Ming, LIU Hui-Hong. Determination of Chromium(Ⅵ) in Textiles Based on Fluorescence Quenching of Nanogold Clusters[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(5): 773-778. doi: 10.11895/j.issn.0253-3820.150894 shu

Determination of Chromium(Ⅵ) in Textiles Based on Fluorescence Quenching of Nanogold Clusters

LI Yun ^1,2, ,
LI Gang ² ,
LEI Ke-Lin ¹ ,
LI Ming ² ,
LIU Hui-Hong ²

1.
College of Chemical Engineering and Food Science, Hubei Liberal and Arts University, Xiangyang 441053, China;
2.
College of Chemistry and Chemical Engineering, Analysis and Measurement Center, Wuhan Textile University, Wuhan 430200, China

Received Date: 7 November 2015
Revised Date: 22 December 2015

Fund Project: This work was supported by the National Natural Science Foundation of China (No. 51203125)

Chromium(Ⅵ) is one of the forbidden heavy metals in the ecological textiles. It is vitally important to develop methods for the sensitive and selective detection of Cr(Ⅵ) in textile samples. In this work, gold nano-particles-sodium alginate clusters (AuNPs-SA) was prepared with sodium alginate in one-step synthesis route and its fluorescent property was investigated. The strongest fluorescence intensity of AuNPs-SA clusters located at the max emission wavelength λ_em=415 nm under the excitation wavelength of λ_ex=360 nm. A fluorimetric method was developed based on the fluorescent AuNPs-SA nanocomposites selectively quenched in the presence of Cr(Ⅵ). The possible quenching mechanism was discussed on the basis of the interaction of positive AuNPs-SA with negative Cr (Ⅵ). Under the optimized experimental conditions, The ratiometric fluorescence was linearly proportional to the concentration of Cr(Ⅵ) ranging from 1.0×10^-8 mol/L to 9.0×10^-8 mol/L. The limit of determination (LOD) was estimated at 5.0×10^-9 mol/L based on the regression calculations. This method was used for the determination of chromium (Ⅵ) in textile samples, and the obtained result had no significant difference compare to the results based on the National Standard of the People's Republic of China (GB/T 17593.3-2006).
- Sodium alginate,
- Gold nanoparticles,
- Fluorescence quenching,
- Chromium (Ⅵ)
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