Electroanalytical determination of total phenolic compounds by square-wave voltammetry using a poly(vinylpyrrolidone)-modified carbon-paste electrode

被引：22
作者：
Piovesan, Jamille V. [1 ]
Jost, Cristiane L. [1 ]
Spinelli, Almir [1 ]
机构：
[1] Univ Fed Santa Catarina, Dept Quim CFM, Grp Estudos Proc Eletroquim & Eletroanalit, BR-88040900 Florianopolis, SC, Brazil
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2015年 / 216卷
关键词：
Electrochemical sensor; Carbon-paste; Poly(vinylpyrrolidone); Kaempferol; Total phenolic compounds; FOOD ANALYSIS; POLYPHENOLS; OXIDATION; PROTEIN; SAMPLES; WINES; TEA;
D O I：
10.1016/j.snb.2015.04.031
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A carbon paste electrode (CPE) modified with poly(vinylpyrrolidone) (PVP) was employed as an electrochemical sensor for the determination of total phenolic compounds (TPCs) in vegetables by square-wave voltammetry (SWV). The calibration curve obtained using kaempferol as a model for TPCs showed two linear ranges from 0.05 to 0.50 mu mol L-1 (R-2= 0.980) and from 0.50 to 6.0 mu mol L-1 (R-2= 0.998). With the use of the most sensitive range, the limits of detection and quantification were 40 nmol L-1 and 160 nmol L-1, respectively. The following sequence was determined for the content of TPCs in the vegetables analysed: spinach > cabbage > broccoli > chicory. The accuracy of the results provided by the proposed sensor was evaluated by comparison with the values obtained applying the Folin-Ciocalteau (FC) methodology. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：192 / 197
页数：6
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