文章基本信息

标题：Comparative Study of Glyphosate and AMPA Determination in Environmental Samples by Two Green Methods
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作者：Bruno Molero da Silva ; Fernanda Benetti ; Maria Olímpia Oliveira Rezende 等
期刊名称：Open Access Library Journal
印刷版ISSN：2333-9705
电子版ISSN：2333-9721
出版年度：2015
卷号：2
期号：6
页码：1-11
DOI：10.4236/oalib.1101553
语种：English
出版社：Scientific Research Pub
摘要：Glyphosate, N-phosphonomethyl-glycine (GLY), is a systemic post-emergence herbicide that controls weeds with great efficiency whose low cost is reflected in its wide application. In the environment, the presence of aminomethylphosphonic acid (AMPA), its main degradation product, is indicative of the application of GLY to the land. The aim of this study was to develop two analytical methods for the determination of GLY by HPLC-UV and GLY and AMPA by GC-MS, in water, soil and sediment samples. The proposed HPLC-UV method proved to be an efficient way of determining GLY in environmental samples of water, soil and sediment, eliminating the step of extraction and clean-up. On the other hand, the GC-MS method can be used to determine both GLY and AMPA simultaneously. The limits of detection (LOD) and quantitation (LOQ) for GLY by the HPLC method were 9.93 and 30.1 μg·L﹣1 for water samples, and 0.040 and 0.120 mg·kg﹣1 for soil and sediment samples, respectively. By the GC-MS method, the LOD and LOQ for GLY were 0.67 and 2.02 μg·L﹣1 for water samples, and 0.0027 and 0.0081 mg·kg﹣1 for soil and sediment samples, respectively. For AMPA, these limits were 0.15 and 0.45 μg·L﹣1 for water samples and 0.0006 and 0.0018 mg·kg﹣1 for soil and sediment samples, respectively. The recoveries ranged from 70% to 120% for water, soil and sediment samples.
关键词：GlyphosateAMPAEnvironmental SamplesHPLC-UVGC-MS