Selective pressurized liquid extraction of polychlorinated biphenyls in sediment.
A selective pressurized liquid extraction procedure (SPLE) was developed for a fast determination of polychlorinated biphenyls in sediment. The final method was performed at 100 degrees C with heptane/dichloromethane (90:10, v/v) as extraction solvent for 2x5 min. Sulfuric acid impregnated silica was placed downstream of the sample in the extraction cell to remove interfering components. This simultaneous extraction/clean-up was performed in 20 min, with an average congener recovery of 92% compared to a classical 24 h Soxhlet methodology and 2 h of external manual clean-up.
Westbom
Rikard
R
Department of Analytical Chemistry, Lund University, Lund, Sweden.
Sporring
Sune
S
Cederberg
Louise
L
Linderoth
Lars-Ola
LO
Björklund
Erland
E
D004785:Environmental Pollutants / Q000737:chemistry / Q000302:isolation & purification*; D019015:Geologic Sediments / Q000737:chemistry*; D011078:Polychlorinated Biphenyls / Q000737:chemistry / Q000302:isolation & purification*; D012822:Silicon Dioxide / Q000737:chemistry; D013464:Sulfuric Acids / Q000737:chemistry
D004785:Environmental Pollutants; D013464:Sulfuric Acids; D012822:Silicon Dioxide; D011078:Polychlorinated Biphenyls; C033158:sulfuric acid