A colorimetric probe for ascorbic acid based on copper-gold nanoparticles in electrospun nylon

被引：27

作者：

Mudabuka, Boitumelo ^{[1
]}

Ondigo, Dezzline ^{[1
]}

Degni, Slyvestre ^{[1
]}

Vilakazi, Sibulelo ^{[2
]}

Torto, Nelson ^{[1
]}

机构：

[1] Rhodes Univ, Dept Chem, ZA-6140 Grahamstown, South Africa

[2] MINTEK, Adv Mat Div, Nanotechnol Innovat Ctr, ZA-2125 Randburg, South Africa

来源：

MICROCHIMICA ACTA | 2014年 / 181卷 / 3-4期

关键词：

Electrospinning; Electrospun nanofibres; Colorimetric probe; Cu-Au alloy nanoparticles; AA; SILVER NANOPARTICLES; VITAMIN-C; NANOFIBERS; DOPAMINE; SENSOR;

D O I：

10.1007/s00604-013-1114-4

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We report on a colorimetric probe based on copper-gold alloy nanoparticles (NPs). The probe is capable of selectively detecting ascorbic acid (AA) as a result of the distance-dependent colour change of the nanoparticles immobilized in an electrospun nylon-6 nanofiber. The resulting white nanofibres undergo a colour change to blue as a result of the aggregation of the NPs induced by AA in the pH range 2-7. The probe is selective for AA even in the presence of dopamine, uric acid, saccharides, amino acids and certain organic acids. It covers the 1.76 x10(-2) mg L-1 to 1.76 x10(5) mg L-1 concentration range, and exhibits a limit of detection of 1.76 x10(-2) mg L-1 based on visual detection. Its application was demonstrated by the determination of ascorbic acid in fruit juices, urine, serum, and vitamin C tablets.

引用

页码：395 / 401

页数：7

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