02363naa a2200265 a 450000100080000000500110000800800410001902400540006010000200011424502070013426000090034152014150035065300170176565300340178265300470181665300140186365300280187765300150190570000170192070000220193770000170195970000210197670000250199777300750202220508472021-11-10       2016    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1016/j.ecoenv.2016.07.0382DOI1 aLEMOS, M. A. T.  aDevelopment, validation, and application of a method for selected avermectin determination in rural waters using high performance liquid chromatography and fluorescence detection.h[electronic resource]  c2016  aAvermectins (AVM) are macrocyclic lactones used in livestock and agriculture. A quantitative method of high performance liquid chromatography with fluorescence detection for the determination of eprinomectin, abamectin, doramectin and ivermectin in rural water samples was developed and validated. The method was employed to study samples collected in the Pito Aceso River microbasin, located in the Bom Jardim municipality, Rio de Janeiro State, Brazil. Samples were extracted by solid phase extraction using a polymeric stationary phase, the eluted fraction was re-concentrated under a gentle N2 flow and derivatized to allow AVM determination using liquid chromatography with fluorescence detection. The excitation and emission wavelengths of the derivatives were 365 and 470 nm, respectively, and a total chromatographic run of 12 min was achieved. Very low limits of quantification (22-58 ng L-1) were found after re-concentration using N2. Recovery values varied from 85.7% to 119.2% with standard deviations between 1.2% and 10.2%. The validated method was applied in the determination of AVM in 15 water samples collected in the Pito Aceso River microbasin, but most of them were free of AVM or showed only trace levels of these compounds, except for a sample that contained doramectin (9.11 ug L-1). The method is suitable for routine analysis with satisfactory recovery, sensitivity, and selectivity.  aAvermectinas  aContaminação da água rural  aCromatografia líquida de alta performance  aHPLC-Fluo  aLactonas macrocíclicas  aPesticidas1 aMATOS, C. A.1 aRESENDE, M. F. de1 aPRADO, R. B.1 aDONAGEMMA, R. A.1 aPEREIRA NETTO, A. D.  tEcotoxicology and Environmental Safetygv. 133, p. 424-432, Nov. 2016.