采用加速溶剂萃取（ASE）—气相色谱法测定土壤中的12种类二恶英多氯联苯。
12 kinds of dioxin-like polychlorinated biphenyls(PCBs)in soil were determined by accelerated solvent extraction(ASE)and gas chromatography method.
这是令人共同担忧的问题，但研究发现，大多数的广泛使用的补充剂含有很少或根本没有汞、二恶英和多氯联苯的物质。
The concern is a common one, but studies have found that most of the widely available supplements contain little or no mercury, dioxins or PCBs.
已知实例为二恶英和多氯联苯。
Known examples are Dioxins and PCBs (polychlorinated biphenyls).
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