Occurrence and determination of organic pollutants in aerosol, precipitation, and sediment samples collected at Lake Balaton

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Abstract

The results of the determination of different organic pollutants [organic acids, polycyclic aromatic hydrocarbons (PAHs), n-alkanes, volatile hydrocarbons] in aerosols, precipitation, atmosphere, and sediment samples collected at Lake Balaton are presented. Different chromatographic methods were used: capillary zone electrophoresis (CZE) for organic acids, GC-MS for n-alkanes, solid-phase extraction (SPE) and HPLC for PAHs and thermal desorption-GC for BTEX (benzene, toluene, ethylbenzene, m- and p-xylene) compounds. For the determination of the size distribution of organic compounds aerosol was collected by an 8-stage Berner-type low-pressure impactor. Low-molecular mass organic acids were extracted in water in an ultrasonic bath and analysed by CZE. n-Alkanes were extracted by n-hexane, cleaned up on a silica cartridge and analysed by GC-MS. For analysis of PAHs in aerosols, samples were extracted in dichloromethane and acetone, cleaned on a Sep-Pak C18 cartridge and analysed by HPLC-fluorescence detection. Enrichment of PAHs of the precipitation samples was accomplished by SPE on a C18 cartridge. PAHs were eluted with dichloromethane and analysed by HPLC-fluorescence detection. The detection limit was <1 ng l-1 for several PAHs. Well dried and sieved (500-μm sieve) sediment samples were extracted with dichloromethane and acetone. The extracts were cleaned and analysed by HPLC-fluorescence detection. Fourteen PAHs were determined and fluoranthene was found to have the highest concentration at 24 μg 8 kg-1. BTEX compounds were collected by diffusive sampling on Carbopack adsorbent. Samples were analysed by a GC-thermal desorber method and one magnitude higher concentration of volatile compounds was found among the different locations.

Original languageEnglish
Pages (from-to)349-361
Number of pages13
JournalJournal of Chromatography A
Volume774
Issue number1-2
DOIs
Publication statusPublished - Jul 11 1997

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Keywords

  • Aerosols
  • Air analysis
  • Alkanes
  • Environmental analysis
  • Organic acids
  • Polynuclear aromatic hydrocarbons
  • Precipitation analysis
  • Sample handling
  • Sediments
  • Volatile organic compounds

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Organic Chemistry

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