Comparison of the performance of graphitized carbon black and poly(styrene-divinylbenzene) cartridges for the determination of pesticides and industrial phosphates in environmental waters

J Chromatogr A. 1999 Dec 9;864(1):121-36. doi: 10.1016/s0021-9673(99)00989-9.

Abstract

The determination of polar and nonpolar organophosphorus compounds, triazines and their metabolites, molinate and chlorothalonil in 1 l water samples was investigated using off-line solid-phase extraction followed by gas chromatography with nitrogen-phosphorus and flame photometric detection. The ethylvinylbenzene-divinylbenzene copolymer (LiChrolut EN) and the commercial graphitized carbon black (GCB) of Envi-Carb were tested as solid-phase sorbents. The matrix effect was studied by extracting the compounds spiked in water samples of different types (Milli-Q, tap, salted tap water, river and sea water). The polymeric sorbent LiChrolut EN allowed the determination at low ng/l of all 40 compounds tested, except the very polar atrazine-desethyl-deisopropyl (DDA). Recoveries of compounds from the Envi-Carb sorbent are comparable to those obtained for LiChrolut EN with the exception of chlorothalonil and the more hydrophobic organophosphorus compounds (coumaphos, leptophos), which were strongly sorbed in the Envi-Carb cartridges. Envi-Carb, however, enabled the determination of DDA with a limit of detection of 14 ng/l.

Publication types

  • Comparative Study

MeSH terms

  • Adsorption
  • Carbon*
  • Chromatography, Gas / methods
  • Environmental Monitoring
  • Graphite*
  • Indicators and Reagents
  • Industrial Waste / analysis
  • Pesticides / analysis*
  • Phosphates / analysis*
  • Polystyrenes*
  • Sensitivity and Specificity
  • Solvents
  • Water / chemistry*
  • Water Pollutants / analysis

Substances

  • Indicators and Reagents
  • Industrial Waste
  • Pesticides
  • Phosphates
  • Polystyrenes
  • Solvents
  • Water Pollutants
  • Water
  • Carbon
  • Graphite
  • Amberlite XAD-2 resin