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    STUDIA CHEMIA - Issue no. 1-2 / 2001  
         
  Article:   SAMPLE HANDLING CROMATOGRAPHIC ANALYSIS OF TRIFLURALIN FROM ENVIRONMENTAL SAMPLE. I. WATER SAMPLE.

Authors:  S. COBZAC, M.C. BACIU, A. MOCANU, I. HAIDUC.
 
       
         
  Abstract:  Trifluralin is a preemergent herbicide with little postemergent activity. When incorporated in the soil it is effective for the control of annual grasses and broad–leaved weeds in beans, soyabeans, sugar beet, sunflower, and tomatoes. That is why trifluralin can be found in small quantities in the soil and accidentally, in greater concentrations in soil and water as a consequence of other human activities in the field. In the analytical chain, sample handling is very important for the accuracy and the precision of the analysis. This pesticide is extracted from environmental water sample using liquid-liquid extraction and solid phase extraction. The present paper deals with SPE of trifluralin on C18 cartridge. The efficiency of the sample treatment was evaluated by the recovery degree of the pesticide from spiked water samples. When methanol was used as a conditioning and elution solvent, the recovery was higher than 90% and the reproductibility was better.  
         
     
         
         
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