The determination of organochlorine compounds by adsorptive stripping voltammetry, part II: 2,4-dichlorophenoxyacetic acid and 2,4,5-trichlorophenoxyacetic acid

1990 ◽  
Vol 2 (1) ◽  
pp. 69-73 ◽  
Author(s):  
Chiang Li ◽  
Bruce D. James ◽  
Robert J. Magee
Keyword(s):  
Stripping Voltammetry ◽  
Adsorptive Stripping Voltammetry ◽  
Organochlorine Compounds ◽  
Dichlorophenoxyacetic Acid ◽  
Trichlorophenoxyacetic Acid ◽  
2,4 Dichlorophenoxyacetic Acid

scholarly journals Electroanalytical Methodology for the Direct Determination of 2,4-Dichlorophenoxyacetic Acid in Soil Samples Using a Graphite-Polyurethane Electrode

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Fernanda Ramos de Andrade ◽  
Renata Alves de Toledo ◽  
Carlos Manoel Pedro Vaz
Keyword(s):  
Irreversible Process ◽  
Direct Determination ◽  
Parameters Optimization ◽  
Dichlorophenoxyacetic Acid ◽  
Reduction Peak ◽  
Undisturbed Soil ◽  
Polyurethane Composite ◽  
Experimental Parameters ◽  
2,4 Dichlorophenoxyacetic Acid

An electroanalytical methodology was developed for the direct determination of the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) using a graphite-polyurethane composite electrode and square wave voltammetry (SWV). 2,4-D exhibited one reduction peak with characteristics of an irreversible process at −0.54 V (versus Ag/AgCl), which is controlled by the diffusion of the reagent on the electrode surface. After the experimental parameters optimization (pH 2.0,f=50 s−1,a=0.50 V, andΔEi=0.03 V), analytical curves were constructed in the range of 0.66 mg L−1to 2.62  mg L−1. Detection (LD) and quantification (LQ) limits were 17.6 μg L−1and 58.6 μg L−1, respectively. The methodology was successfully applied to measure the percolation of the herbicide 2,4-D in undisturbed soil columns of different granulometric compositions.

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