Skip to main content
padlock icon - secure page this page is secure

Dispersive liquid-liquid microextraction followed by high-performance liquid chromatography for the determination of three carbamate pesticides in water samples

Buy Article:

$61.00 + tax (Refund Policy)

A simple, rapid and efficient method, dispersive liquid-liquid microextraction (DLLME) in conjunction with high-performance liquid chromatography (HPLC), has been developed for the determination of three carbamate pesticides (methomyl, carbofuran and carbaryl) in water samples. In this extraction process, a mixture of 35 µL chlorobenzene (extraction solvent) and 1.0 mL acetonitrile (disperser solvent) was rapidly injected into the 5.0 mL aqueous sample containing the analytes. After centrifuging (5 min at 4000 rpm), the fine droplets of chlorobenzene were sedimented in the bottom of the conical test tube. Sedimented phase (20 µL) was injected into the HPLC for analysis. Some important parameters, such as kind and volume of extraction and disperser solvent, extraction time and salt addition were investigated and optimised. Under the optimum extraction condition, the enrichment factors and extraction recoveries ranged from 148% to 189% and 74.2% to 94.4%, respectively. The methods yielded a linear range in the concentration from 1 to 1000 µg L-1 for carbofuran and carbaryl, 5 to 1000 µg L-1 for methomyl, and the limits of detection were 0.5, 0.9 and 0.1 µg L-1, respectively. The relative standard deviations (RSD) for the extraction of 500 µg L-1 carbamate pesticides were in the range of 1.8-4.6% (n = 6). This method could be successfully applied for the determination of carbamate pesticides in tap water, river water and rain water.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Keywords: carbamate pesticides; dispersive liquid-liquid microextraction; high-performance liquid chromatography; water samples

Document Type: Research Article

Affiliations: School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan, China

Publication date: January 1, 2009

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more