Simultaneous spectrophotometric determination of atrazine and dicamba in water by partial least squares regression

• Judith Amador-Hernández ^[1] ; Miguel Velázquez-Manzanares ^[1] ; María del Rocío Gutiérrez-Ortiz ^[1] ; Beatriz Hernández-Carlos ^[1] ; Magaly Peral-Torres ^[1] ; Pedro Luis López-de- Alba ^[2]
  1. [1] Universidad del Mar

     Universidad del Mar

     México

     
  2. [2] Universidad de Guanajuato

     Universidad de Guanajuato

     México

     
• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 50, Nº. 2, 2005, págs. 461-464
• Idioma: inglés
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• Resumen

  • It is presented the development of a new and easy analytical method for the simultaneous determination of atrazine and dicamba in water. Under the experimental conditions proposed, atrazine showed a linear dynamic range of 0.3 to 4.9 µg mL-1, a limit of detection of 0.1 µg mL-1 and a limit of quantification of 0.3 µg mL-1; similarly, dicamba showed a linear dynamic range of 0.8 to 8.8 µg mL-1, a limit of detection of 0.2 µg mL-1 and a limit of quantification of 0.8 µ mL-1. Partial Least Squares Regression (Type 1) was applied for the resolution of spectral interferences between analytes, obtaining recovery percentages higher than 95 % for both compounds in synthetic mixtures. Finally, quantitative determination of both herbicides in tap, well and sea water samples, was carried out successfully by the proposed method, previous preconcentration of the analytes by solid phase extraction