Response surface methodology for optimisation of 4,6-Dinitro-o-cresol quantification using hanging mercury drop electrode

A method for the pesticide DNOC (4,6-Dinitro-o-cresol) quantification using hanging mercury drop electrode (HMDE) and stripping square wave voltammetry (SSWV) optimisation is proposed. As a continuous cathodic current decrease was observed during the experiments, a waiting time, together with soluti...

Full description

Saved in:
Bibliographic Details
Published in:International journal of environmental analytical chemistry 2019-01, Vol.99 (1), p.74-86
Main Authors: Cuellar, Mariela, Moreno Betancourth, Jessica, Pfaffen, Valeria, Ortiz, Patricia I.
Format: Article
Language:English
Subjects:
Calibration
Cresols
Dependent variables
desirability function
DNOC
Electrodes
hanging mercury drop electrode
Mercury
Mercury surface
Optimization
Parameters
Pesticides
pH effects
Process parameters
Response surface methodology
Square waves
Water analysis
Water sampling
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A method for the pesticide DNOC (4,6-Dinitro-o-cresol) quantification using hanging mercury drop electrode (HMDE) and stripping square wave voltammetry (SSWV) optimisation is proposed. As a continuous cathodic current decrease was observed during the experiments, a waiting time, together with solution pH and SWV instrumental variables were optimised by factorial designs. From the two reduction current peaks values, only one was considered as dependent variable in the optimisation process. While the cathodic current peak and standard deviation were used in the waiting time and solution pH optimisation process, the instrumental parameters for SWV were optimised by using only current peak values. With the optimal parameters, a calibration curve from (0.01-0.55) × 10 −6  mol L −1 with LOD of 2 × 10 −8  mol L −1 was obtained. The proposed method was checked for DNOC quantification in different water samples obtained from Cordoba area and very good results, with recovery values around 102% were observed.
ISSN:0306-7319
1029-0397
DOI:10.1080/03067319.2018.1563602