Immersed solvent microextraction and gas chromatography-mass spectrometric detection of s-triazine herbicides in aquatic media

Bagheri, H ; Sharif University of Technology | 2005

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  1. Type of Document: Article
  2. DOI: 10.1016/j.aca.2005.01.036
  3. Publisher: Elsevier , 2005
  4. Abstract:
  5. An immersed solvent microextraction (SME) method was successfully developed for the trace enrichment of s-triazine herbicides from aquatic media. A microdrop of butyl acetate was applied as the extraction solvent. After extraction, the microdrop was introduced directly into a gas chromatography-mass spectrometry (GC-MS) injection port. Some important extraction parameters such as type of solvent, extraction time, stirring rate, and temperature were investigated and optimized. The highest possible microdrop volume of 3 μl, a sampling temperature of 60°C, and use of butyl acetate are major parameters to obtain high enrichment factors. The enrichment factor and linearity was studied by preconcentration of 1 ml of HPLC-grade, rice farm water and river water, spiked with a standard solution of triazines at a concentration range of 0.1-100 μg l-1 (R.S.D. < 11%). The correlation coefficient was satisfactory (r2 > 0.98) for all the studied triazines. Detection limits were obtained using HPLC-grade and river water, i.e. 0.015-0.4 μg l-1. The effect of matrix on extraction efficiency was, also, studied using some real-life water samples. © 2005 Elsevier B.V. All rights reserved
  6. Keywords:
  7. Correlation methods ; Enzymes ; Gas chromatography ; Herbicides ; High performance liquid chromatography ; Mass spectrometry ; Organic compounds ; Correlation coefficients ; Microdrop ; Solvent microextraction (SME) ; Triazines ; Solvent extraction ; Acetic acid ; Butyl acetate ; Herbicide ; River water ; Solvent ; Triazine ; Unclassified drug ; Water ; Chemical analysis ; Concentration (parameters) ; Correlation coefficient ; Extraction ; Liquid phase microextraction ; Priority journal ; Sampling ; Temperature ; Water analysis
  8. Source: Analytica Chimica Acta ; Volume 537, Issue 1-2 , 2005 , Pages 81-87 ; 00032670 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0003267005000371