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
收藏
页码：2560 / 2566
页数：7
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