Application of Programmed Temperature Vaporization Large Volume Injection Gas Chromatography (PTV-LVI-GC) to the Analysis of Polycyclic Aromatic Hydrocarbons (PAHs) in Soils

Authors

  • Miguel Ángel Delgadillo-Marín Universidad Nacional Autónoma de México
  • Araceli Peña-Álvarez Universidad Nacional Autónoma de México
  • Mario Villalobos Villalobos Universidad Nacional Autónoma de México

DOI:

https://doi.org/10.29356/jmcs.v57i2.217

Keywords:

polycyclic aromatic hydrocarbons, PAH, large volume injection, programmed temperature vaporization, solvent vent, soil analysis

Abstract

A sensitive, selective and robust method was developed to quantify low levels of polycyclic aromatic hydrocarbons (PAHs) in soils by means of Programmed Temperature Vaporization - Large Volume Injection (PTV-LVI) coupled to gas chromatography with flame ionization detection. Optimal vent pressure and flux at the PTV inlet of the GC system were determined by comparison of peak areas obtained from injection of a standard PAHs mixture at different conditions. Assessment of method performance was carried out with home-made standards prepared by spiking three non-PAH contaminated soils that contained 1.8%, 4.6% and 25% natural organic matter (NOM), with mixtures of six different PAHs at low concentration levels. Detection limits between 9 and 12 ng g-1 and variation coefficients below 11% were determined from analysis of spiked samples of the soil with lowest NOM content. PAHs recoveries typically ranged from 61% to 96% for the three studied soils.

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Author Biographies

Miguel Ángel Delgadillo-Marín, Universidad Nacional Autónoma de México

Facultad de Química, Departamento de Química Analítica

Araceli Peña-Álvarez, Universidad Nacional Autónoma de México

Facultad de Química, Departamento de Química Analítica

Mario Villalobos Villalobos, Universidad Nacional Autónoma de México

Instituto de Geología, Departamento de Geoquímica

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Published

2017-10-12

Issue

Section

Regular Articles