2024-03-29T11:03:24Zhttps://repositori.uji.es/oai/requestoai:repositori.uji.es:10234/627502024-02-21T12:47:53Zcom_10234_33596com_10234_9col_10234_33597
00925njm 22002777a 4500
dc
Portoles, Tania
author
Hernandez, Felix
author
Díaz San Pedro, Ramón
author
Ibáñez, Maria
author
Bustos López, Martha Cristina
author
Botero-Coy, Ana Maria
author
Fuentes, C. L.
author
Peñuela, Gustavo
author
2012-11
The irrigate district of Usosaldaña, an important agricultural area in Colombia mainly devoted to rice crop production, is subjected to an intensive use of pesticides. Monitoring these compounds is necessary to know the impact of phytosanitary products in the different environmental compartments. In this work, surface water and soil samples from different sites of this area have been analyzed by applying an analytical methodology for large screening based on the use of time-of-flight mass spectrometry (TOF MS) hyphenated to liquid chromatography (LC) and gas chromatography (GC). Several pesticides were detected and unequivocally identified, such as the herbicides atrazine, diuron or clomazone. Some of their main metabolites and/or transformation products (TPs) like deethylatrazine (DEA), deisopropylatrazine (DIA) and 3,4-dichloroaniline were also identified in the samples. Among fungicides, carbendazim, azoxystrobin, propiconazole and epoxiconazole were the most frequently detected. Insecticides such as thiacloprid, or p,p′-DDT metabolites (p,p′-DDD and p,p′-DDE) were also found. Thanks to the accurate-mass full-spectrum acquisition in TOF MS it was feasible to widen the number of compounds to be investigated to other families of contaminants. This allowed the detection of emerging contaminants, such as the antioxidant 3,5-di-tertbutyl-4-hydroxy-toluene (BHT), its metabolite 3,5-di-tert-butyl-4-hydroxy-benzaldehyde (BHT-CHO), or the solar filter benzophenone, among others
http://hdl.handle.net/10234/62750
http://dx.doi.org/10.1016/j.scitotenv.2012.09.036
TOF MS
Large screening
Pesticides
Water
Soil
Rice production
Use of time-of-flight mass spectrometry for large screening of organic pollutants in surface waters and soils from a rice production area in Colombia