Browsing by Author "Seguel, Rodrigo"

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    • Arsenic speciation in environmental samples of a mining impacted sector of central Chile 
      Richter Duk, Pablo; Seguel, Rodrigo; Ahumada Torres, Aída Inés de Lourdes; Verdugo, R.; Narváez, Jessica; Shibata, Yasuyuni (SOCIEDAD CHILENA DE QUIMICA, 2004-12)
      The presence of high concentrations of arsenic and copper was determined in most of the environmental matrixes under study (river water, river sediments, and soils), which suggests a real impact of the copper mining activity ...
    • Screening and determination of pesticides in soil using continuous subcritical water extraction and gas ... 
      Richter Duk, Pablo; Sepúlveda, Betsabet; Oliva, Rodrigo; Calderón del Río, Katia Romina; Seguel, Rodrigo (ELSEVIER SCIENCE BV, 2003-04-25)
      In the present work the efficiency of water under subcritical conditions for the extraction of pesticides having a broad spectrum of polarities from soils was evaluated. The pesticides under study were carbofuran, ...