Changes in polychlorinated biphenyl (PCB) concentrations in surface sediments in Lake Hartwell, South Carolina.Polychlorinated biphenyls polychlorinated biphenyls, (pol´ēklôr´  nā´tid bīfē´n (PCBs) were once produced by the Sangamo
Weston Plant located on Twelve Mile Creek, which feeds into Lake
Hartwell. Their production was discontinued in 1978. Samples were taken
form the surface sediments in Lake Hartwell and then were put through an
extraction procedure that utilizes acetone acetone (ăs`ĭtōn), dimethyl ketone (dīmĕth`əl kē`tōn), or 2-propanone (prō`pənōn), CH3COCH3 , isooctane i·so·oc·tane n. A highly flammable liquid, (CH3)2CHCH2C(CH3)3, used to determine the octane ratings of fuels. , and a sonicator to dislodge the hydrophobic PCBs from the sediments into solution. This solution was concentrated and analyzed using a gas chromatograph to find the PCB PCB: see polychlorinated biphenyl. PCB in full polychlorinated biphenyl Any of a class of highly stable organic compounds prepared by the reaction of chlorine with biphenyl, a two-ring compound. concentration. These newly found concentrations were then compared to analyses from previous years to see if the concentrations were going down. |
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