Methodology for Quantitative Determination of Polycyclic Aromatic Hydrocarbons in Protozoa Cultures

Authors

  • Martha Patricia García de Llasera Universidad Nacional Autónoma de México
  • José de Jesús Olmos-Espejel Universidad Nacional Autónoma de México

DOI:

https://doi.org/10.29356/jmcs.v55i2.841

Keywords:

polycyclic aromatic hydrocarbons, matrix solid phase dispersion, solid phase extraction, high performance liquid chromatography- fluorescence, protozoan, Colpoda cucullus.

Abstract

Two simple and sensitive analytical methods based on matrix solid phase dispersion (MSPD) and solid phase extraction (SPE), both followed by high performance liquid chromatography (HPLC) with fluorescence detection (FL) were developed for determining the high molecular weight polycyclic aromatic hydrocarbons (PAH) benzo(a)anthracene, benzo(b)fluoranthene and benzo(a)pyrene, in liquid cultures of the ciliate protozoan Colpoda cucullus. The first method employed MSPD technique for extraction of the analytes from a very small amount of microorganisms and insoluble organic matter.
The second method used SPE to extract analytes from the liquid medium. Validation parameters indicated good linearity (r2 > 0.99) andprecision (inter-day RSDs < 7%) for both methods. Recovery values were >90% for MSPD and 70% for SPE with limits of detection between 0.02 and 0.03 μg/g for MSPD-HPLC and between 0.03 and 0.04 μg/L for SPE-HPLC. The developed methodology was successfully used for the quantitative determination of PAH in microorganism cultures for the first time.

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Author Biographies

Martha Patricia García de Llasera, Universidad Nacional Autónoma de México

Facultad de Química, Departamento de Química Analítica

José de Jesús Olmos-Espejel, Universidad Nacional Autónoma de México

Facultad de Química, Departamento de Química Analítica

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Published

2019-04-22

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Regular Articles