Chemical preservation of volatile organic compounds in soil

Article Abstract:

Chemical preservation of volatile organic compounds (VOC) from using sodium chloride presents a potential means for correcting data losses due to gaps in collection and analysis of VOC from soil sampled in sites. Current practice in the collection and analysis of VOC involves storage of the compounds at 4 degree celsius in hermetically sealed bottles. This collection procedure, however, still allows for active microbial degradation of VOC resulting to inaccurate analysis.

Scientific Research and Development Services, Research & Development NEC, Methods, Research institutes, Soil research

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Round-robin study of performance evaluation soils vapor-fortified with volatile organic compounds

Article Abstract:

Soil samples vapor-fortified with trans-1, 2-dichloroethylene (TDCE), trichloroethylene (TCE), benzene and toluene were analyzed using methanol extraction and purge-and-trap gas chromatography mass spectrometry. Relative standard deviations were from 8.5-28.2%, and best precision was seen with benzene. The results showed that vapor-fortification coupled with confinement in sealed glass ampules is an excellent method for preparing and storing contaminated soil samples.

Soil analysis

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Comparison of sample preparation methods for the analysis of volatile organic compounds in soil samples: solvent extraction vs vapor partitioning

Article Abstract:

Methanol extraction proved to be more efficient than direct vapor partitioning method in the removal of volatile organic compounds in soil. Results revealed that soil organic content, the octanol-water partition coefficients of specific analytes and the duration of solvent extraction govern the recovery efficiencies of the preparation methods.

Research and Development in the Physical, Engineering, and Life Sciences, All Other Basic Organic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Pollution Control R&D, Misc Organic Chemicals, Pollution, Organic compounds, Soil disinfection, Pollution control research, Chemistry, Analytic, Analytical chemistry

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