Sensitive spectrophotometric determination of ascorbic acid in drugs and foods using surface plasmon resonance band of silver nanoparticles

被引：7
|
作者：
Zarei, Kobra [1 ]
Moghaddary, Somayye [1 ]
机构：
[1] Damghan Univ, Sch Chem, Damghan, Iran
来源：
COGENT CHEMISTRY | 2015年 / 1卷 / 01期
关键词：
ascorbic acid; food and pharmaceutical samples; silver nanoparticle;
D O I：
10.1080/23312009.2015.1109172
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A simple and sensitive procedure was proposed for spectrophotometric determination of ascorbic acid. It was found that the reduction of Ag+ to silver nanoparticles (Ag-NPs) by ascorbic acid in the presence of polyvinylpyrrolidone (PVP) as a stabilizing agent produce very intense surface plasmon resonance peak of Ag-NPs. The plasmon absorbance of the Ag-NPs at lambda = 440 nm allows the quantitative spectrophotometric detection of the ascorbic acid. The calibration curve was linear with concentration of ascorbic acid in the range of 0.5-60 mu M. The detection limit was obtained as 0.08 mu M. The influence of potential interfering substances on the determination of ascorbic acid was studied. The proposed method was successfully applied for the determination of ascorbic acid in some powdered drink mixtures, commercial orange juice, natural orange juice, vitamin C injection, effervescent tablet, and multivitamin tablet.
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页数：8
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