...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Analytica chimica acta >Montmorillonite as an adsorbent for extraction and concentration of atrazine, propazine, deethylatrazine, deisopropylatrazine and hydroxyatrazine
【24h】

Montmorillonite as an adsorbent for extraction and concentration of atrazine, propazine, deethylatrazine, deisopropylatrazine and hydroxyatrazine

机译：蒙脱土作为吸附剂，用于提取和浓缩阿特拉津，丙嗪，脱乙基阿特拉津，脱异丙基阿特拉津和羟基阿特拉津

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Adsorption properties of the clay mineral montmorillonite in the potassium homoionic form (KMT) was investigated to achieve the extraction and concentration of the herbicides atrazine (AT) and propazine (PROP), as well as the main degradation products of atrazine, namely deethylatrazine (DEA), deisopropylatrazine (DIA) and hydroxyatrazine (ATOH). A batch approach was proposed, with recovery percentages for AT, PROP and DIA higher than 90% at concentrations of 0.50 and 2.50 mu g L-1. For DEA and ATOH, however, low recoveries were obtained. For DEA, this fact can be explained by its low K-d with KMT, contrary to ATOH, which interacts strongly with the mineral surface, hindering the complete desorption and hence, generating low recovery percentages. The influence of pH, ionic strength and humic acid was studied, and a comparison with the C-18 phase as SPE cartridges was carried out. Montmorillonite showed a similar performance to commercial cartridge for concentrations of AT, DEA and PROP, but better recoveries for DIA was obtained using the clay mineral. For ATOH the recovery was also higher on the clay mineral, although for this compound the most suitable SPE cartridge is constituted by cation exchange resin. After the concentration and elution steps, the 0.50 and 2.50 mu g L-1 gave chromatographic peak areas that could be easily quantified with an analytical curve obtained in the concentration range between 7.5 and 100 mu g L-1. The obtained concentration factors are suitable to allow the application of the method to the monitoring of triazine residues in drinking water. (c) 2006 Elsevier B.V. All rights reserved.
机译：研究了钾均离子形式（KMT）的粘土矿物蒙脱土的吸附性能，以实现对除草剂阿特拉津（AT）和丙嗪（PROP）以及阿特拉津的主要降解产物脱乙基阿特拉津（DEA）的提取和浓缩。 ），去异丙基at去津（DIA）和羟基at去津（ATOH）。提出了一种分批方法，当浓度为0.50和2.50μg L-1时，AT，PROP和DIA的回收率高于90％。但是，对于DEA和ATOH，回收率较低。对于DEA，这一事实可以通过其与KOH的低K-d值来解释，这与ATOH相反，后者与矿物表面强烈相互作用，阻碍了完全脱附，因此回收率低。研究了pH，离子强度和腐殖酸的影响，并与C-18相作为SPE柱进行了比较。蒙脱土对AT，DEA和PROP的浓度表现出与商用滤芯相似的性能，但使用粘土矿物可提高DIA的回收率。对于ATOH，在粘土矿物上的回收率也更高，尽管对于这种化合物，最合适的SPE滤芯由阳离子交换树脂组成。经过浓缩和洗脱步骤后，0.50和2.50μgL-1给出了色谱峰面积，该峰面积可通过在7.5至100μgL-1浓度范围内获得的分析曲线轻松定量。所获得的浓度因子适合于将该方法应用于饮用水中三嗪残留物的监测。 （c）2006 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号