02135naa a2200217 a 450000100080000000500110000800800410001910000190006024501440007926000090022330000090023252014920024165000100173365000130174365000190175665000140177565000210178970000210181070000180183177300680184921278672020-12-08       2020    bl uuuu     u00u1 u    #d1 aCORREIA, N. M.  aDetection of herbicides in water bodies of the Samambaia River sub-basin in the Federal District and eastern Goiás.h[electronic resource]  c2020  a8 p.  aThe objective of this study was to identify and quantify herbicide residues in water samples of rain, cisterns, streams, ponds, springs, semi-artesian wells, dams and a river in the Rio Samambaia sub-basin in the Federal District and eastern Goiás. A total of 287 samples were collected from 20 farms in the sub-basin in the rainy (February, summer) and dry (August, winter) seasons in 2016. Aminomethylphosphonic acid (AMPA, a glyphosate metabolite), clethodim, chlorimuron-ethyl, diuron, fluazifop acid (a fluazifop-p-butyl metabolite and the active ingredient), haloxyfop acid (a haloxyfop-methyl metabolite and the active ingredient), imazamox, mesotrione, metsulfuron, nicosulfuron and pendimethalin were not identified in any water sample. In the rainy season, approximately 99% of the samples contained residues at least one of the evaluated herbicides; in the dry season (, 100% of the samples contained residues of at least one of the evaluated herbicides. When considering only detection frequency, metribuzin, atrazine, clomazone and haloxyfop-methyl were the main herbicides found in the water of the Samambaia River sub-basin. In turn, based on levels higher than the limit of quantification, the main compounds detected were atrazine, clomazone, haloxyfop-methyl and glyphosate. In both seasons, the highest relative concentrations of herbicides for the rainy and dry seasons were found in spring water, 25% and 56%, respectively, and dam water, 23% and 16%, respectively.  aÁgua  aCisterna  aContaminação  aHerbicida  aRecurso Hídrico1 aCARBONARI, C. A.1 aVELINI, E. D.  tJournal of Environmental Science and Healthgv. 55, n. 6, 2020.