Rapid In Situ Collection and Analysis of Semivolatile Organics by Thermal Extraction Cone Penetrometry Gas Chromatography/Mass Spectrometry

Field Analytical Chemistry and Technology Pub Date : 2000-01-01 DOI:10.1002/1520-6521(2000)4:2/3<85::AID-FACT3>3.0.CO;2-#

Alexander Gorshteyn, A. Robbat

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引用次数: 4

Abstract

A thermal extraction cone penetrometer (TECP) has been developed to detect subsurface contaminants in situ without bringing soil to the surface or into a col- lection chamber. Coupled with thermal desorption gas chromatography/mass spectrometry (TD-GC/MS) sample collection and analysis can be accomplished in 20 min for the full range of U.S. Environmental Protection Agency Target Compounds (EPA). TECP extraction effi- ciencies of 50 to 100% can be obtained for most EPA Method 8270 compounds. Results of 99 volatile and semivolatile organics analyzed from the same TECP ex- tracted soil in 16 and 40 min are presented. Measurement precision and accuracy were well within the Method 8270 benchmarks required for solvent-extracted soils ana- lyzed by GC/MS. The total ion and reconstructed ion cur- rent chromatograms are shown for chlorinated solvents and gasoline constituents extracted from a hazardous waste site located at Hanscom Air Force Base (Bedford, MA). Data compared favorably against traditional purge and trap GC/MS. 2000 John Wiley & Sons, Inc. Field Analyt Chem Technol 4: 85-92, 2000

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半挥发性有机物的快速原位采集与分析——热萃取锥透入-气相色谱/质谱法

开发了一种热提取锥入仪(TECP)，可以在不将土壤带到地面或进入收集室的情况下原位检测地下污染物。结合热解吸气相色谱/质谱(TD-GC/MS)，可在20分钟内完成美国环境保护局目标化合物(EPA)全系列样品的收集和分析。对大多数EPA Method 8270化合物，TECP萃取率可达50% ~ 100%。本文报道了同一土壤在16 min和40 min内99种挥发性和半挥发性有机物的分析结果。测定精密度和准确度均在方法8270标准要求的范围内，适用于溶剂萃取土壤的GC/MS分析。总离子和重构离子电流色谱图显示了从汉斯科姆空军基地(Bedford, MA)的危险废物场地提取的氯化溶剂和汽油成分。与传统的吹扫和陷阱GC/MS相比，数据更有利。2000 John Wiley & Sons, Inc。化学工程学报(自然科学版)，2000

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Field Analytical Chemistry and Technology

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