Quantiative determination of sulfonated aliphatic and aromatic surfactants in sewage sludge by ion-pair/supercritical fluid extraction and derivatization gas chromatography/mass spectrometry

Journal Article · Tue Dec 15 04:00:00 EST 1992 · Analytical Chemistry (Washington); (United States)

DOI:https://doi.org/10.1021/ac00048a013· OSTI ID:6998709

Field, J A; Field, T M; Giger, W ^[1]; Miller, D J; Hawthorne, S B ^[2]

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1. Swiss Federal Inst. for Water Resources and Water Pollution Control, Duebendorf (Switzerland)
2. Univ. of North Dakota, Grand Forks (United States)

Secondary alkanesulfonate (SAS) and linear alkylbenzene-sulfonate (LAS) surfactants were quantitatively (> 90%) extracted from sewage sludges as their tetrabutylammonium ion pairs using 400 atm of supercritical CO[sub 2] for 5 min of static extraction followed by 10 min of dynamic extraction at 80[degrees]C. Ion pairs of SAS and LAS quantitatively formed butyl esters in the injection port of the gas chromatograph and were determined by gas chromatography/mass spectrometry without class fractionation of the sewage sludge extracts. Concentrations of SAS and LAS in sludges from five different sewage treatment plants ranged from 0.27 to 0.80 g/kg of dry sewage sludge and from 3.83 to 7.51 g/kg, respectively. Good reproducibility was achieved with RSDs of typically 5% for replicate extractions and analyses. Homologue and isomer distributions of SAS in sewage sludge indicated an enrichment of the more hydrophobic components in sewage sludge during sewage treatment. 25 refs., 5 figs., 5 tabs.

• OSTI ID: 6998709
• Journal Information: Analytical Chemistry (Washington); (United States), Journal Name: Analytical Chemistry (Washington); (United States) Vol. 64:24; ISSN 0003-2700; ISSN ANCHAM
• Country of Publication: United States
• Language: English

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