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In 1994, we collected 36 soil samples and 61 sediment samples from southern Mississippi, USA. Each sample was analyzed for PCDDs and PCDFs by HRMS using either a polar or a non-polar HRGC column. Although most Cl 4 - Cl 8 PCDDs and PCDFs were detected in each sample, PCDD levels (particularly Cl 7 - Cl 8 ) were higher in sediment than soil samples. The PCDF pattern...
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