•  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
热点追踪
期刊检索


检索
检索项:
检索词:
总目录
  • 关于召开第十五届全国青年分析测试学术报告会的通知 查看全文>>
  • CBIFS2015第八届中国国际食品安全技术论坛 查看全文>>
友情链接
磁固相萃取/离子色谱法测定土壤中草甘膦
    点此下载全文
作者单位
杨健,李振宇,祝艳,杨德志,杨亚玲 1.昆明市环境监测中心2.昆明理工大学生命科学与技术学院 
中文摘要:利用离子色谱结合磁固相萃取技术,建立了一种简单快速测定土壤样品中草甘膦残留的新方法,并对提取溶剂、离子色谱条件以及净化吸附剂进行了优化。样品经水提取后,先用乙腈沉淀杂质,再用Fe3O4磁性纳米材料净化处理,经IonPac AS11-HC 离子色谱柱分离,以30 mmol/L KOH 为淋洗液,电导检测器进行检测。结果表明,草甘膦在0.05~2.0 mg/L范围内线性关系良好,相关系数为0.999 7,检出限为13 μg/L,定量下限为45 μg/L。对采自三七和灯盏花种植基地的土壤样品进行加标回收实验,在50、100、200 μg/L加标水平下的回收率为83.2%~94.5%,日内相对标准偏差(RSD)为1.9%~3.1%,日间RSD为1.9%~3.7%。该方法具有操作简单、快速、灵敏、结果准确可靠的特点,完全满足国家标准的检测要求。
中文关键词:离子色谱  磁固相萃取  草甘膦  土壤样品
 
Determination of Glyphosate Residues in Soil Samples by Ion Chromatography Combined with Magnetic Solid Phase Extraction
Abstract:Combined with magnetic solid phase extraction,a simple and rapid ion chromatographic method was established for the detection of glyphosate residues in soil samples.Experimental conditions such as extraction solvent,conditions of ion chromatography and purification material were also optimized.After extracted with water,the samples were precipitated with acetonitrile to eliminate the impurities,then purifed with Fe3O4 magnetic nanoparticles.The supernatant was separated on an IonPac AS11-HC column with 30 mmol/L KOH as the eluent,and a conductivity detector was used for the detection.Results showed that a good linearity was obtained in the range of 0.05-2.0 mg/L(r2 =0.999 7).The limits of detection and quantitation for the analyte were 13 μg/L and 45 μg/L,respectively.The recoveries for the soil samples at spiked levels of 50,100 and 200 μg/L were between 83.2% and 94.5%,with the intra-day and inter-day RSDs of 1.9%-3.1% and 1.9%-3.7%,respectively.The method is simple,rapid,sensitive and reliable,and could fully meet the detection requirements in the national standard.
Key Words:ion chromatography  magnetic solid phase extraction  glyphosate  soil samples
引用本文:杨健,李振宇,祝艳,杨德志,杨亚玲.磁固相萃取/离子色谱法测定土壤中草甘膦[J].分析测试学报,2018,37(9):1051-1055.
摘要点击次数: 43
全文下载次数: 53
查看全文  查看/发表评论  下载PDF阅读器