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首页> 外文期刊>International journal of environmental analytical chemistry >Uncovering seasonal patterns of 56 pesticides in surface coastal waters of the Ria Formosa lagoon (Portugal), using a GC-MS method
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Uncovering seasonal patterns of 56 pesticides in surface coastal waters of the Ria Formosa lagoon (Portugal), using a GC-MS method

机译：使用GC-MS方法发现Ria Formosa泻湖（葡萄牙）的近岸海水中56种农药的季节性模式

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摘要

This study describes the simultaneous quantification of 56 pesticides in surface coastal water, supported by the development and validation of a gas chromatography (GC)-ion trap (IT) mass spectrometry (MS) method. Samples (500mL) were pre-concentrated 2500 times by solid phase extraction (OASISTMHLB). The compounds were identified and quantified, within 35minutes, by GC tandem mass spectrometry (GC-MS/MS) and GC-MS, respectively. The methodology proved to be highly specific for all target pesticides, with an average linearity of 0.99. Detection limits and recovery rates ranged from 0.4 to 1.3ng L-1 and 71% to 120%, respectively. The performance of the method was checked using water samples collected from nine sampling sites along the Ria Formosa Lagoon Natural Park (south of Portugal, n=54) in each season (2010). The total annual concentrations of all pesticides in each category (fungicides, herbicides and insecticides) were 1.4, 0.6 and 9.0 mu gL(-1), respectively. Moreover, 89% of the pesticides tested for were detected, 84% could be quantified and 25% had concentrations above the European recommended levels (2013/39/EU). The highest total loads of pesticides were found in the spring, which is in agreement with their seasonal application. Physicochemical parameters such as, nitrites, nitrates, ammonia and phosphates, also indicate poor water quality, supporting the fact that the Ria Formosa lagoon actually needs an effective monitoring programme for effective preservation of its natural reserve status.
机译：这项研究描述了在气相色谱（GC）-离子阱（IT）质谱（MS）方法的开发和验证的支持下，对沿海表层水中56种农药的同时定量。通过固相萃取（OASISTMHLB）将样品（500mL）预浓缩2500次。在35分钟内分别通过GC串联质谱（GC-MS / MS）和GC-MS对化合物进行了鉴定和定量。该方法被证明对所有目标农药具有高度特异性，平均线性为0.99。检出限和回收率分别为0.4至1.3ng L-1和71％至120％。在每个季节（2010年）中，使用沿Ria Formosa泻湖自然公园（葡萄牙南部，n = 54）的9个采样点收集的水样检查该方法的性能。每个类别中所有农药（杀真菌剂，除草剂和杀虫剂）的年总浓度分别为1.4、0.6和9.0μgL（-1）。此外，检测到的农药中有89％被检出，其中84％可以定量，而25％的浓度超过了欧洲推荐水平（2013/39 / EU）。在春季发现了最高的农药总量，这与它们的季节性应用相符。亚硝酸盐，硝酸盐，氨和磷酸盐等理化参数也表明水质较差，这支持Ria Formosa泻湖实际上需要有效的监测程序来有效保护其自然保护区。

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    Cruzeiro Catarina; Rocha Eduardo; Pardal Miguel Angelo; Rocha Maria Joao;

  • 作者单位

    Univ Porto, Grp Histomorphol Physiopathol & Appl Toxicol, CIIMAR CIMAR Interdisciplinary Ctr Marine & Envir, P-4050313 Oporto, Portugal|Univ Porto, ICBAS Inst Biomed Sci Abel Salazar, Dept Microscopy, P-4050123 Oporto, Portugal;

    Univ Porto, Grp Histomorphol Physiopathol & Appl Toxicol, CIIMAR CIMAR Interdisciplinary Ctr Marine & Envir, P-4050313 Oporto, Portugal|Univ Porto, ICBAS Inst Biomed Sci Abel Salazar, Dept Microscopy, P-4050123 Oporto, Portugal;

    CFE, Dept Life Sci, Coimbra, Portugal;

    Univ Porto, Grp Histomorphol Physiopathol & Appl Toxicol, CIIMAR CIMAR Interdisciplinary Ctr Marine & Envir, P-4050313 Oporto, Portugal|Univ Porto, ICBAS Inst Biomed Sci Abel Salazar, Dept Microscopy, P-4050123 Oporto, Portugal;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Environmental monitoring; GC-MS/MS; pesticides; SPE; surface waters;

    机译：环境监测;GC-MS / MS;农药;SPE;地表水;

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