Improved Detection of Ascorbic Acid with a Bismuth-Silver Nanosensor

被引：9

作者：

van der Horst, Charlton ^{[1
,2
]}

Silwana, Bongiwe ^{[1
,2
]}

Iwuoha, Emmanuel ^{[1
]}

Gil, Eric ^{[3
]}

Somerset, Vernon ^{[2
]}

机构：

[1] Univ Western Cape, Dept Chem, SensorLab, ZA-7535 Bellville, South Africa

[2] CSIR, NRE, ZA-7600 Stellenbosch, South Africa

[3] Univ Fed Goias, Fac Farm, Campus Colemar Natal & Silva, BR-74605220 Praca Univ, Go, Brazil

来源：

FOOD ANALYTICAL METHODS | 2016年 / 9卷 / 09期

基金：

新加坡国家研究基金会;

关键词：

Bismuth-silver bimetallic nanoparticles; Ascorbic acid; Differential pulse voltammetry; Fruit samples; Pharmaceutical samples; GLASSY-CARBON ELECTRODE; INJECTION SPECTROPHOTOMETRIC DETERMINATION; URIC-ACID; FLOW-INJECTION; VOLTAMMETRIC DETERMINATION; VITAMIN-C; PASTE ELECTRODE; DOPAMINE; NANOPARTICLES; COMPOSITE;

D O I：

10.1007/s12161-016-0444-3

中图分类号：

TS2 [食品工业];

学科分类号：

0832 ;

摘要：

Bismuth-silver bimetallic nanoparticles glassy carbon electrode (Bi-AgNPs/GCE) was employed for the determination of ascorbic acid (AA) in fruit and pharmaceutical samples. In this study, the Bi-AgNPs/GCE showed excellent electrochemical catalytic activities toward AA oxidation compared with bare GCE. Ascorbic acid gave a sensitive oxidation peak at 0.23 V using differential pulse voltammetry. Under optimized experimental conditions, the limit of detection for AA was 0.16 mu M (for S/N = 3), the analytical range for AA was between 0.4 and 1.2 mu M (R (2) = 0.994) and the RSD was 5.84 % (n = 10). The proposed method showed good stability, reproducibility, and repeatability as well as good recovery in fruit and pharmaceutical samples.

引用

页码：2560 / 2566

页数：7

共 43 条

[1] Capability of a carbon-polyvinylchloride composite electrode for the detection of dopamine, ascorbic acid and uric acid [J].