2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 11: Recycling & Environmental
| Editors: | Kongoli F, Havlik T, Pagnanelli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 410 pages |
| ISBN: | 978-1-987820-34-8 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Electrochemical Determination of Paraquat in Potato, Lemon, Orange and Natural Water Samples Using Sensitive-Rich Clay Carbon Electrode
Sahar Elkasmi1;1INH MOROCCO, Rabat, Morocco;
Type of Paper: Regular
Id Paper: 416
Topic: 10
Abstract:
The present work aimed to achieve valorization of Akrache clay (from Morocco) for the preparation of carbon paste modifier that is commonly used as sensor of pollutants [1]. The collected clay was characterized by different techniques, such as X-ray diffraction (XRD), infrared spectroscopy (IR), absorption atomic spectroscopy (AAS) and thermal analysis (DSC) [2]. In this work, the reduction reaction of paraquat herbicide was used to obtain analytical signals at clay modified carbon paste electrode (CCPE) using electrochemical techniques in Na2SO4 solutions, at pHナ7.0, and containing different concentrations of paraquat [3]. Experimental conditions were optimized by varying the accumulation time, clay loading, measuring solution pH and differential pulse parameters. Calibration plots were linear under the optimized parameters over the herbicide's concentration range 5-240｡ﾑ10-7 mol L-1, with a detection and quantification limits about 1.63｡ﾑ10-9 mol L-1 and 5.43｡ﾑ10-9 mol L-1, respectively. The repeatability expressed as relative standard deviation was always less than 2.13%. The method shows a good repeatability and was successfully applied to the determination of paraquat in potato, lemon, orange and natural water samples.
Key words: Clay, paraquat, river water, food, differential pulse anodic stripping voltammetry.
References:
[1]:A carbon paste electrode modified with kaolin for the detection of diquat Original Research Article
Applied Clay Science, Volume 43, Issue 1, January 2009, Pages 130-134
M.A. El Mhammedi, M. Bakasse, R. Najih, A. Chtaini
[2]: R. E. Grim, Applied Clay Mineralogy, International Series in the Earth Sciences, McGraw Hill, New York, 1962
[3]: Accumulation and trace measurement of paraquat at kaolin-modified carbon paste electrode Original Research Article
Materials Science and Engineering: C, Volume 30, Issue 6, 20 July 2010, Pages 833-838
M.A. El Mhammedi, M. Achak, M. Bakasse, R. Bachirat, A. Chtaini