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Narváez, Jessica ,  Richter Duk, Pablo ,  Toral Ponce, María ,  [Preliminary physical chemical characterization of river waters and sediments affected by copper mining activity in central chile. Application of multivariate analysis]

Toral Ponce, María ,  Tassara, Andrés ,  Soto Salazar, César ,  Richter Duk, Pablo ,  [Simultaneous determination of dapsone and pyrimethamine by derivative spectrophotometry in pharmaceutical formulations]

Toral Ponce, María ,  Lara Henríquez, Nelson ,  Richter Duk, Pablo ,  Tassara, Andrés ,  Tapia, A. E. ,  Rodríguez, C. ,  [Simultaneous determination of ascorbic acid and acetylsalicylic acid in pharmaceutical formulations]

Ahumada Torres, Aída Inés de Lourdes ,  Escudero, Paula ,  Ascar Estay, María Loreto ,  Mendoza, Jorge ,  Richter Duk, Pablo ,  [Extractability of arsenic, copper, and lead in soils of a mining and agricultural zone in central Chile]

Richter Duk, Pablo ,  Castro, H. ,  Toral Ponce, María ,  [Solid phase spectrophotometric determination of copper in water by using immobilized zincon in a Sephadex A25 resin]

Rocco, Gabriela ,  Toledo, Carla ,  Ahumada, Inés ,  Sepúlveda, Betsabet ,  Cañete, Alvaro ,  Richter Duk, Pablo ,  [Determination of polychlorinated biphenyls in biosolids using continuous ultrasound-assisted pressurized solvent extraction and gas chromatography–mass spectrometry]

Leiva, Claudio ,  Ahumada, Inés ,  Sepúlveda, Betsabet ,  Richter Duk, Pablo ,  [Polychlorinated biphenyl behavior in soils amended with biosolids]

Carrera, M. E. ,  Momberg, Astrid ,  Toral Ponce, María ,  Richter Duk, Pablo ,  [Polarographic determination of copper after enrichment by adsorption of the 2,2' - biquinoline complex on activated carbon]

Richter Duk, Pablo ,  Castillo Morales, A. ,  Gómez Jeria, Juan ,  Morales Lagos, Demian ,  [ELECTROCHEMICAL STUDY OF THE HALLUCINOGEN (+/-)-1-(2,5-DIMETHOXY-4-NITROPHENYL)-2-AMINOPROPANE]