草甘膦是大豆作物中使用的主要除草剂,巴西是世界上主要的大豆生产国之一。在巴拉那盆地3的21个微盆地的124个地表水样品中评估了GLY和AMPA(巴拉那州,巴西)在随后的六个星期内。建立了一种简单经济的常规方法,基于冻干作为预浓缩方法。经过验证的方法显示,GLY和AMPA的检出限为0.0125和0.025µgL-1,分别。总的来说,GLY的水样浓度范围为0.31至1.65μgL-1。这些值低于巴西法律中的最大允许量(65μgL-1)。发现AMPA值在0.50至1.40μgL-1的范围内。总之,在19.3%中检测到GLY,在17.7%的样品中定量。在21.8%的样品中检测到AMPA,并且在1.6%的样品中定量。尽管样品的值没有高于巴西法律规定的值,GLY和AMPA不断出现在样品中,这突出了流域监测研究的重要性。
Glyphosate is the main herbicide used in soybean crops, and Brazil is one of the major soybean producers around the world. GLY and
AMPA were evaluated in 124 surface waters samples of twenty one micro basins in Paraná Basin 3 (State of Parana, Brazil) over six subsequent weeks. A simple and economical routine methodology was established, based on lyophilization as a pre-concentration method. The validated method showed a limit of detection of 0.0125 and 0.025 µg L-1 for GLY and
AMPA, respectively. In general, water samples presented concentrations ranging from 0.31 to 1.65 μg L-1 for GLY. Those values are below the maximum allowed amounts in Brazilian Law (65 μg L-1). The
AMPA values were found in the range from 0.50 to 1.40 μg L-1. In summary, GLY was detected in 19.3% and it was quantified in 17.7% of the samples.
AMPA was detected in 21.8% and it was quantified in 1.6% of the samples. Although samples did not present values higher than the established by Brazilian Law, GLY and
AMPA appear constantly in the samples, which highlight the importance of monitoring studies in watersheds.