Sousa Anayla S, Duaví Wersângela C, Cavalcante Rivelino M, Milhome Maria Aparecida L, do Nascimento Ronaldo F
Department of Analytical Chemistry and Physical Chemistry, Federal University of Ceará, R. Humberto Monte S/N, Pici, Fortaleza, Ceará, CEP 60451-970, Brazil.
Marine Sciences Institute, Federal University of Ceará, Av. Abolição, 3207-Meireles, Fortaleza, Ceará, CEP 60165-081, Brazil.
Bull Environ Contam Toxicol. 2016 Jan;96(1):90-5. doi: 10.1007/s00128-015-1686-2. Epub 2015 Nov 4.
Methodology using solid phase extraction and high performance liquid chromatography (SPE-C18/HPLC-DAD) was applied to pesticide determinations in ten water reservoirs in the semidarid region of northeastern Brazil. The validated method was suitable for determination of herbicides and insecticide in surface water. The recovery efficiency of atrazine, methyl-parathion and simazine was approximately 70%. The method also showed good linearity and selectivity with correlation coefficients (R) greater than 0.99. The limits of detection were below the maximum residue limits (MRLs) established by government agencies. Studied reservoirs showed presence of atrazine at mean levels from 7.0 to 15.0 µg/L. Simazine and methyl parathion were not detected during the period. The atrazine levels measured from this semiarid region are of the same magnitude as those found in regions with moderate to high agricultural activity. According to detected atrazine concentrations, the annual health risk to humans was insignificant. However, the control of herbicides is important to maintain the quality of water in the reservoirs of Ceará, Brazil.
采用固相萃取和高效液相色谱法（SPE-C18/HPLC-DAD）对巴西东北部半干旱地区的10个水库中的农药进行测定。该验证方法适用于地表水除草剂和杀虫剂的测定。阿特拉津、甲基对硫磷和西玛津的回收率约为70%。该方法还具有良好的线性和选择性，相关系数（R）大于0.99。检测限低于政府机构规定的最大残留限量（MRLs）。研究的水库中阿特拉津的平均含量为7.0至15.0 µg/L。在此期间未检测到西玛津和甲基对硫磷。该半干旱地区测得的阿特拉津水平与农业活动中等至高的地区相当。根据检测到的阿特拉津浓度，对人类的年度健康风险微不足道。然而，控制除草剂对于维持巴西塞阿拉水库的水质很重要。
