TY - JOUR

T1 - Analysis of chlorobenzenes in sewage sludge by capillary gas chromatography

AU - Wang, Min Jian

AU - Jones, Kevin C.

PY - 1991/1/1

Y1 - 1991/1/1

N2 - An analytical method has been developed to investigate the occurrence of chlorobenzenes in sewage sludge. Sewage sludge was centrifuged, dewatered, Soxhlet extracted, cleaned and analysed by capillary gas chromatography using two columns with different polarity, DB Wax and Ultra-2. The effects on the recovery of chlorobenzenes were examined using different solvents, drying techniques and Soxhlet extraction times. All of the chlorinated benzenes eluted within thirty minutes from both of the capillary columns. Recoveries of these compounds by this procedure were all greater than eighty percent (except for monochlorobenzene) at two concentrations while the coefficient of variation, %C.V., is less than 10%. The detection limits of this method are 5-10 μg/kg (dichlorobenzenes), 0.6-1 μg/kg (trichlorobenzenes), 0.5 μg/kg (tetrachlorobenzenes) and 0.3-0.4 μg/kg (penta- and hexachlorobenzene) when using approximately 1 gram (dry weight) sample. Sewage sludges from municipal and industrial areas have been analysed by this method and the significance of these compounds in sewage sludge discussed.

AB - An analytical method has been developed to investigate the occurrence of chlorobenzenes in sewage sludge. Sewage sludge was centrifuged, dewatered, Soxhlet extracted, cleaned and analysed by capillary gas chromatography using two columns with different polarity, DB Wax and Ultra-2. The effects on the recovery of chlorobenzenes were examined using different solvents, drying techniques and Soxhlet extraction times. All of the chlorinated benzenes eluted within thirty minutes from both of the capillary columns. Recoveries of these compounds by this procedure were all greater than eighty percent (except for monochlorobenzene) at two concentrations while the coefficient of variation, %C.V., is less than 10%. The detection limits of this method are 5-10 μg/kg (dichlorobenzenes), 0.6-1 μg/kg (trichlorobenzenes), 0.5 μg/kg (tetrachlorobenzenes) and 0.3-0.4 μg/kg (penta- and hexachlorobenzene) when using approximately 1 gram (dry weight) sample. Sewage sludges from municipal and industrial areas have been analysed by this method and the significance of these compounds in sewage sludge discussed.

KW - Chlorobenzenes

KW - Gas capillary chromatography

KW - Organic pollution

KW - Sewage sludge

U2 - 10.1016/0045-6535(91)90289-P

DO - 10.1016/0045-6535(91)90289-P

M3 - Journal article

AN - SCOPUS:0025733892

VL - 23

SP - 677

EP - 691

JO - Chemosphere

JF - Chemosphere

SN - 0045-6535

IS - 5

ER -