4 documents found, page 1 of 1
Pesticide residue determination in groundwater using solid-phase extraction and...
Caldas,Sergiane S.; Demoliner,Adriana; Costa,Fabiane P.; D'Oca,Marcelo G. M.; Primel,Ednei G.Residues of four pesticides in groundwaters were surveyed during one year in an agricultural area in southern Brazil. The methods for separation, identification and quantification of the compounds included high-performance liquid chromatography with diode array detection (HPLC-DAD) and liquid chromatography with electrospray interface tandem mass spectrometry (LC-ESI-MS/MS). A pre-concentration step based on so...
Development and validation of a method using SPE and LC-ESI-MS-MS for the deter...
Demoliner,Adriana; Caldas,Sergiane S.; Costa,Fabiane P.; Gonçalves,Fábio F.; Clementin,Rosilene M.; Milani,Márcio R.; Primel,Ednei G.An analytical method using solid-phase extraction and liquid chromatography coupled to electrospray ionization tandem mass spectrometry (LC-ESI-MS-MS) was developed and validated for the determination and confirmation of eighteen polar pesticides (herbicides, insecticides and fungicides) and two metabolites in water samples. The limits of detection varied between 0.4-40.0 ng L-1 and the limits of quantification...
Validation of a method using solid phase extraction and liquid chromatography f...
Caldas,Sergiane S.; Demoliner,Adriana; Primel,Ednei G.A method is described for the determination of the pesticides carbofuran, clomazone, 2,4-D and tebuconazole in groundwaters. The method involves solid phase extraction (SPE) with C18 cartridges and quantification by high performance liquid chromatography with diode array detector (HPLC-DAD). After the optimization of the extraction and separation parameters, the method was validated by evaluating the analytical...
O impacto industrial na composição química das águas subterrâneas com enfoque d...
Mirlean,Nicolai; Machado,Maria Isabel; Osinaldi,Guillermo Martinez; Demoliner,Adriana; Baisch,PauloThe alteration in the quality of groundwater in the industrial zone of Brazil's southernmost state was assessed by a hydrogeochemical study. In 70-85% of the studied area, fluoride, nitrate and phosphate in groundwater surpass the maximum limits for human consumption according to Brazilian environmental legislation. The chemical spectrum of contaminants and their spatial distribution show that fertilizer produc...