海藻酸钠-纳米金复合物荧光猝灭法测定纺织品中的铬(Ⅵ)

引用本文: 李云, 李刚, 雷克林, 李明, 刘慧宏. 海藻酸钠-纳米金复合物荧光猝灭法测定纺织品中的铬(Ⅵ)[J]. 分析化学, 2016, 44(5): 773-778. doi: 10.11895/j.issn.0253-3820.150894 shu

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

海藻酸钠-纳米金复合物荧光猝灭法测定纺织品中的铬(Ⅵ)

李云 ^1,2, ,
李刚 ^2, ,
雷克林 ^1, ,
李明 ^2, ,
刘慧宏 ^2,

1.
湖北文理学院化学工程与食品科学学院, 襄阳 441053;
2.
武汉纺织大学化学与化工学院, 分析测试中心, 武汉 430200
基金项目:
本文系国家自然科学基金(No.51203125)和低维光电材料与器件湖北省重点实验室开放基金(湖北文理学院13XKL01003)资助项目

摘要: 生态纺织品中铬(Ⅵ)含量有严格的限制。本实验利用海藻酸钠一步法成功合成了纳米金溶胶,并对其荧光特性进行了研究。结果表明,海藻酸钠-纳米金复合物(AuNPs-SA)在激发波长λ_ex=330 nm处表现出最强荧光特性,在该激发波长下,最大发射波长λ_em=415 nm。铬(Ⅵ)对海藻酸钠-纳米金复合物的荧光有猝灭效应,纳米金荧光强度随铬(Ⅵ)浓度的增加而减弱,利用其荧光猝灭特性建立了铬(Ⅵ)定量分析方法。调节AuNPs-SA溶液至pH 7.0,加入Cr(Ⅵ),反应40 min后,测定荧光强度变化。铬(Ⅵ)浓度在1.0×10^-8~9.0×10^-8 mol/L范围内与F/F₀有较好的线性关系(R=0.9919),方法的检出限(S/N=3)为5.0×10^-9 mol/L。本方法用于纺织品中苎麻与涤纶的痕量铬(Ⅵ)的检测,所得结果与国家标准方法(GB/T 17593.3-2006)没有显著性差异。

关键词:

English

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

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: 07 November 2015
Revised Date: 22 December 2015
Fund Project:
This work was supported by the National Natural Science Foundation of China (No. 51203125)

Abstract: 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).

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

海藻酸钠-纳米金复合物荧光猝灭法测定纺织品中的铬(Ⅵ)

English

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

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

海藻酸钠-纳米金复合物荧光猝灭法测定纺织品中的铬(Ⅵ)

English

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

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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