A new procedure combining GC-MS with accelerated solvent extraction for the analysis of phthalic acid esters in contaminated soils

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• 作者：Tingting Ma (1) (2)
  Ying Teng (1) (2)
  Peter Christie (3)
  Yongming Luo (1) (2)
  Yongshan Chen (4)
  Mao Ye (2) (5)
  Yujuan Huang (1)
  
• 关键词：phthalic acid esters ; quality assurance and quality control ; soil type ; accelerated solvent extraction ; certified reference materials
• 刊名：Frontiers of Environmental Science & Engineering
• 出版年：2013
• 出版时间：February 2013
• 年：2013
• 卷：7
• 期：1
• 页码：31-42
• 全文大小：274KB
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• 作者单位：Tingting Ma (1) (2)
  Ying Teng (1) (2)
  Peter Christie (3)
  Yongming Luo (1) (2)
  Yongshan Chen (4)
  Mao Ye (2) (5)
  Yujuan Huang (1)
  
  1. Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
  2. Graduate University of the Chinese Academy of Sciences, Beijing, 100049, China
  3. Agri-Environment Branch, Agri-Food and Biosciences Institute, Newforge Lane, Belfast, BT9 5PX, UK
  4. State Key Laboratory of Environment Simulation and Pollution Control (Joint), Tsinghua University, Beijing, 100084, China
  5. State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
  
• ISSN：2095-221X

文摘

An optimized procedure based on gas chromatography-mass spectrometry (GC-MS) combined with accelerated solvent extraction (ASE) is developed for the analysis of six phthalic acid esters (PAEs), which are priority soil pollutants nominated by United States Environmental Protection Agency (USEPA). Quantification of PAEs in soil employs ultrasonic extraction (UE) (USEPA 3550) and ASE (USEPA 3545), followed by clean up procedures involving three different chromatography columns and two combined elution methods. GC-MS conditions under selected ion monitoring (SIM) mode are described and quality assurance and quality control (QA/QC) criteria with high accuracy and sensitivity for target analytes were achieved. Method reliability is assured with the use of an isotopically labeled PAE, di-n-butyl phthalate-d4 (DnBP-D4), as a surrogate, and benzyl benzoate (BB) as an internal standard, and with the analysis of certified reference materials (CRM). QA/QC for the developed procedure was tested in four PAE-spiked soils and one PAE-contaminated soil. The four spiked soils were originated from typical Chinese agricultural fields and the contaminated soil was obtained from an electronic waste dismantling area. Instrument detection limits (IDLs) for the six PAEs ranged 0.10-.31 μg·L? and method detection limits (MDLs) of the four spiked soils varied from a range of 20-0 μg·kg? to a range of 90-90 μg·kg?. Linearity of response between 20 μg·L? and 2 mg·L? was also established and the correlation coefficients (R) were all>0.998. Spiked soil matrix showed relative recovery rates between 75 and 120% for the six target compounds and about 93% for the surrogate substance. The developed procedure is anticipated to be highly applicable for field surveys of soil PAE pollution in China.