Evaluation of the reliability of diffusive sampling in environmental monitoring

Balázs Tolnai, A. Gelencsér, Csilla Gál, J. Hlavay

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Diffusive sampling has long been available as an alternative to active sampling in occupational hygiene to determine the concentrations of toxic volatile organic compounds in workplace air. Diffusive sampling has many advantages including increased sampling time, simplicity and lower unit sample cost. On the other hand, its application in environmental monitoring is ambiguous, because the reliability of this technique under environmental conditions is subject to much controversy. The main question is whether the simple uptake model of diffusive sampling can be applied under environmental conditions.In this paper, the applicability of the simplified uptake model of diffusive sampling for benzene, toluene, ethylbenzene and m,p-xylene (BTEX compounds) was studied in the environment. It was found that a critical exposure dose should be exceeded to obtain consistent and reliable analytical data and to ensure that the simplified uptake theory is useful. It was concluded that the main source of uncertainty in environmental applications of diffusive sampling was the use of uptake rates determined in the laboratory. Although the uptake rates seem to be stabilised when the critical exposure limit is exceeded, their determination requires field comparison with a standard reference method. Copyright (C) 2000 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)117-122
Number of pages6
JournalAnalytica Chimica Acta
Volume408
Issue number1-2
DOIs
Publication statusPublished - Mar 9 2000

Fingerprint

Volatile Organic Compounds
Environmental Monitoring
Poisons
Toluene
Benzene
environmental monitoring
Hygiene
Workplace
Uncertainty
Air
Sampling
Costs and Cost Analysis
Monitoring
sampling
environmental conditions
BTEX
hygiene
xylene
3-xylene
ethylbenzene

Keywords

  • BTEX compounds
  • Diffusive sampling
  • Reliability
  • Uptake rate

ASJC Scopus subject areas

  • Biochemistry
  • Analytical Chemistry
  • Spectroscopy
  • Environmental Chemistry

Cite this

Evaluation of the reliability of diffusive sampling in environmental monitoring. / Tolnai, Balázs; Gelencsér, A.; Gál, Csilla; Hlavay, J.

In: Analytica Chimica Acta, Vol. 408, No. 1-2, 09.03.2000, p. 117-122.

Research output: Contribution to journalArticle

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