Carbon Paste Electrode Modified with Biochar for Sensitive Electrochemical Determination of Paraquat

被引：48
|
作者：
Kalinke, Cristiane [1 ]
Mangrich, Antonio S. [2 ,3 ]
Marcolino-Junior, Luiz H. [1 ]
Bergamini, Marcio F. [1 ]
机构：
[1] Univ Fed Parana, Dept Quim, Lab Sensores Eletroquim LabSensE, BR-81531980 Curitiba, PR, Brazil
[2] Univ Fed Parana, Dept Quim, Lab Quim Humus & Fertilizantes, BR-81531980 Curitiba, PR, Brazil
[3] CNPq, INCT E&A, Sao Paulo, Brazil
来源：
ELECTROANALYSIS | 2016年 / 28卷 / 04期
关键词：
Paraquat; biochar; carbon paste electrode; adsorptive stripping analysis; PYROLYSIS TEMPERATURE; REMOVAL; ADSORPTION; BIOMASS; VOLTAMMETRY; WATER; LEAD;
D O I：
10.1002/elan.201500640
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The present work reports for the first time the determination of paraquat (PQ(2+)) by Differential Pulse Adsorptive Stripping Voltammetry (DPAdSV) using a carbon paste electrode modified (CPME) with biochar obtained from castor oil cake at different temperatures (200600 degrees?). The best voltammetric response was verified using biochar yielded at 400 degrees C (CPME-BC400). Linear dynamic range (LDR) for PQ(2+) concentrations between 3.0x10(-8) and 1.0x10(-6) molL(-1) and a limit of detection (LOD) of 7.5x10(-9) molL(-1) were verified. The method was successfully applied for PQ(2+) quantification in spiked samples of natural water and coconut water.
引用
收藏
页码：764 / 769
页数：6
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