Evaluation of on-line methodology for microwave-assisted extraction of polycyclic aromatic hydrocarbons (PAHs) from sediment samples

S.L. Cresswell, S.J. Haswell

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The development of novel on-line microwave techniques is described for the selective extraction of polycyclic aromatic hydrocarbons from sediment samples. Two flow systems were evaluated, in the first, samples of sediment were slurried in water and on passing through the microwave the analytes were extracted and subsequently trapped onto a C18 cartridge. Elution from the in-line C18 cartridge directly onto an analytical HPLC column was then performed. In the second study, samples were slurried in acetone and passed through the microwave cavity. The effluent was then shaken with 10 ml of hexane in order to pre-concentrate the extracted components, which were detected and quantified by GC-MS. Recoveries from the second technique on average ranged from 62 to 93% (0.28-8.15 µg). Both techniques were compared to the standard EPA method for microwave-assisted solvent extraction. The second method based on acetone, was found to give comparable recoveries to the EPA method, but offered significant improvement in the precision for replicate samples which were found to be in the range 2-7% RSD compared to 6-16% RSD for the batch technique.
LanguageEnglish
Pages1361-1366
Number of pages5
JournalAnalyst
Volume124
Issue number9
DOIs
Publication statusPublished - 1999

Fingerprint

Polycyclic Aromatic Hydrocarbons
Polycyclic aromatic hydrocarbons
Microwaves
PAH
Sediments
methodology
Acetone
acetone
sediment
Recovery
Hexanes
Solvent extraction
Hexane
Effluents
cavity
High Pressure Liquid Chromatography
effluent
evaluation
microwave
Water

Keywords

  • on-line microwave techniques
  • polycyclic aromatic hydrocarbons
  • microwave cavity
  • EPA method
  • C18 cartridge

Cite this

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title = "Evaluation of on-line methodology for microwave-assisted extraction of polycyclic aromatic hydrocarbons (PAHs) from sediment samples",
abstract = "The development of novel on-line microwave techniques is described for the selective extraction of polycyclic aromatic hydrocarbons from sediment samples. Two flow systems were evaluated, in the first, samples of sediment were slurried in water and on passing through the microwave the analytes were extracted and subsequently trapped onto a C18 cartridge. Elution from the in-line C18 cartridge directly onto an analytical HPLC column was then performed. In the second study, samples were slurried in acetone and passed through the microwave cavity. The effluent was then shaken with 10 ml of hexane in order to pre-concentrate the extracted components, which were detected and quantified by GC-MS. Recoveries from the second technique on average ranged from 62 to 93{\%} (0.28-8.15 µg). Both techniques were compared to the standard EPA method for microwave-assisted solvent extraction. The second method based on acetone, was found to give comparable recoveries to the EPA method, but offered significant improvement in the precision for replicate samples which were found to be in the range 2-7{\%} RSD compared to 6-16{\%} RSD for the batch technique.",
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Evaluation of on-line methodology for microwave-assisted extraction of polycyclic aromatic hydrocarbons (PAHs) from sediment samples. / Cresswell, S.L.; Haswell, S.J.

In: Analyst, Vol. 124, No. 9, 1999, p. 1361-1366.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Cresswell, S.L.

AU - Haswell, S.J.

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N2 - The development of novel on-line microwave techniques is described for the selective extraction of polycyclic aromatic hydrocarbons from sediment samples. Two flow systems were evaluated, in the first, samples of sediment were slurried in water and on passing through the microwave the analytes were extracted and subsequently trapped onto a C18 cartridge. Elution from the in-line C18 cartridge directly onto an analytical HPLC column was then performed. In the second study, samples were slurried in acetone and passed through the microwave cavity. The effluent was then shaken with 10 ml of hexane in order to pre-concentrate the extracted components, which were detected and quantified by GC-MS. Recoveries from the second technique on average ranged from 62 to 93% (0.28-8.15 µg). Both techniques were compared to the standard EPA method for microwave-assisted solvent extraction. The second method based on acetone, was found to give comparable recoveries to the EPA method, but offered significant improvement in the precision for replicate samples which were found to be in the range 2-7% RSD compared to 6-16% RSD for the batch technique.

AB - The development of novel on-line microwave techniques is described for the selective extraction of polycyclic aromatic hydrocarbons from sediment samples. Two flow systems were evaluated, in the first, samples of sediment were slurried in water and on passing through the microwave the analytes were extracted and subsequently trapped onto a C18 cartridge. Elution from the in-line C18 cartridge directly onto an analytical HPLC column was then performed. In the second study, samples were slurried in acetone and passed through the microwave cavity. The effluent was then shaken with 10 ml of hexane in order to pre-concentrate the extracted components, which were detected and quantified by GC-MS. Recoveries from the second technique on average ranged from 62 to 93% (0.28-8.15 µg). Both techniques were compared to the standard EPA method for microwave-assisted solvent extraction. The second method based on acetone, was found to give comparable recoveries to the EPA method, but offered significant improvement in the precision for replicate samples which were found to be in the range 2-7% RSD compared to 6-16% RSD for the batch technique.

KW - on-line microwave techniques

KW - polycyclic aromatic hydrocarbons

KW - microwave cavity

KW - EPA method

KW - C18 cartridge

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