Browsing by Author "Narváez, Jessica"
Now showing items 1-4 of 4
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Narváez, Jessica; Richter Duk, Pablo; Toral Ponce, María (SPRINGER HEIDELBERG, 2005-04)A simple continuous flow method is proposed to eliminate copper interference in arsenic speciation by hydride generation, based on the selective retention of this interfering ion in an iminodiacetate chelating resin previous ...
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Narváez, Jessica; Richter Duk, Pablo; Toral Ponce, María (SOC CHILENA QUIMICA, 2007-09)The concentration of trace elements and other analytes of environmental interest was determined in waters and sediments of the Coya and Cachapoal rivers (VI Region, Central Chile), which corresponds to a location highly ...
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Toledo, Carla; Valle, Luis; Narváez, Jessica; Richter Duk, Pablo (SOC BRASILEIRA QUIMICA, 2007)A rapid and simple method was developed for screening polychlorinated biphenyls in transformer oil. The method is based on liquid-liquid extraction in methanol and subsequent direct gas chromatography-mass spectrometric ...
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Toral Ponce, María; Paipa Gómez, Carolina; Narváez, Jessica; Richter Duk, Pablo (ELSEVIER SCIENCE BV, 2002-12)A new method for the simultaneous determination of iron and ruthenium at ultra-trace levels is proposed. The method is based on the formation of the iron and ruthenium complexes with 2,4,6-tri-(2-pyridil)-1,3,5-triazine ...