Evaluation of a fluorometric screening method for predicting total pah concentrations in contaminated sediments

G. S. Peterson, Richard P Axler, Keith B Lodge, J. A. Schuldt, J. L. Crane

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A fluorometric screening method was used to estimate total polycyclic aromatic hydrocarbon (t-PAH) concentrations in sediments collected from the St. Louis River Area of Concern (AOC) in northeastern Minnesota. Sediments were collected as part of a Regional Environmental Monitoring and Assessment Program (R-EMAP) study to assess sediment quality in the AOC. The screening method was calibrated using a PAH surrogate standard consisting of eight PAHs commonly found in the St. Louis River system, at their approximate proportions. Estimated PAH concentrations were compared to GC/MS measured 'true' PAH concentrations to evaluate the overall predictive power of the screening method. Regression analysis of log transformed estimated versus true PAH concentration yielded an r2 of 0.72 (n = 86). In addition, the rates of false positive and false negative predictions associated with the screening method were determined relative to different sediment effects concentrations (SECs) for total PAHs. In general, the rate of false positive predictions was shown to increase as the SEC criteria value decreased, while false negative rates remained consistently low (below 7%). Methodological recommendations which led to a three-fold reduction in false negatives, and the improved prediction of both high and low PAH samples, are presented.

Original languageEnglish (US)
Pages (from-to)111-129
Number of pages19
JournalEnvironmental Monitoring and Assessment
Volume78
Issue number2
DOIs
StatePublished - Sep 1 2002

Fingerprint

Polycyclic aromatic hydrocarbons
Screening
PAH
Sediments
sediment
Rivers
prediction
Polycyclic Aromatic Hydrocarbons
method
evaluation
screening
Regression analysis
environmental assessment
environmental monitoring
river system
regression analysis
fold
Monitoring
river
rate

Keywords

  • Fluorometry
  • PAHs
  • Screening method
  • Sediments

Cite this

Evaluation of a fluorometric screening method for predicting total pah concentrations in contaminated sediments. / Peterson, G. S.; Axler, Richard P; Lodge, Keith B; Schuldt, J. A.; Crane, J. L.

In: Environmental Monitoring and Assessment, Vol. 78, No. 2, 01.09.2002, p. 111-129.

Research output: Contribution to journalArticle

Peterson, G. S. ; Axler, Richard P ; Lodge, Keith B ; Schuldt, J. A. ; Crane, J. L. / Evaluation of a fluorometric screening method for predicting total pah concentrations in contaminated sediments. In: Environmental Monitoring and Assessment. 2002 ; Vol. 78, No. 2. pp. 111-129.
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