Digital Library
Close Browse articles from a journal
 
<< previous    next >>
     Journal description
       All volumes of the corresponding journal
         All issues of the corresponding volume
           All articles of the corresponding issues
                                       Details for article 18 of 34 found articles
 
 
  Differential pulse polarographic behaviour of thiazopyr herbicide and application to its determination in fruit juice and soil samples
 
 
Title: Differential pulse polarographic behaviour of thiazopyr herbicide and application to its determination in fruit juice and soil samples
Author: Mercan, Hulya
Inam, Recai
Appeared in: International journal of environmental analytical chemistry
Paging: Volume 88 (2008) nr. 12 pages 879-890
Year: 2008-10
Contents: A differential pulse polarographic method for the determination of the herbicide thiazopyr has been developed. The polarographic study of thiazopyr exhibited two well-defined cathodic peaks within the pH range of 1.0 to 8.0. The variation of pH and polarographic parameters indicated that the optimum conditions under which thiazopyr could be reduced were a pH 7.0 BR buffer solution, a reduction peak potential of -1270 mV (vs. SCE), scan rate of 5 mV s-1, pulse amplitude of 50 mV with pulse duration of 50 ms at an ambient temperature of 25 ± 3°C. The main reduction peak was characterised by cyclic voltammetry as being irreversible and diffusion-controlled. A linear relationship between the peak current and the concentration of thiazopyr was obtained in the range of 0.43-38.6 µg mL-1, with a detection limit of 0.127 µg mL-1. The proposed method was successfully applied to the determination of thiazopyr in spiked fruit juice and soil samples. The mean recoveries of the 19.8 µg g-1 and 3.96 µg mL-1 thiazopyr spiked to soil and orange juice were 20.2 ± 1.0 µg g-1 and 3.84 ± 0.12 µg mL-1, at 95% confidence level, respectively. The sufficiently good recoveries and low relative standard deviation (RSD) data confirm the high accuracy and precision of the proposed method. The interferences effects of several commonly used pesticides and inorganic species were also studied. Interfering effects were eliminated either by providing selectivity with pH, or using EDTA as complexing agent.
Publisher: Taylor & Francis
Source file: Elektronische Wetenschappelijke Tijdschriften
 
 

                             Details for article 18 of 34 found articles
 
<< previous    next >>
 
 Koninklijke Bibliotheek - National Library of the Netherlands