These systems
from Horizon Technology
are optimized for
EPA Method 1668A
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Developed
in the early 1900's, Polychlorinated biphenyls (PCBs) are
chlorinated oils that remain stable when subjected to heat and
pressure. These traits, combined with their high electrical
resistance, made them ideal for use in insulators, transformers and
capacitors. PCBs performed well in those initial applications and
their use expanded into hydraulic fluids, casting wax, carbonless
carbon paper, compressors, pigments, adhesives and fluorescent light
ballasts.
Polychlorinated biphenyls make up a group of 209 individual
chlorinated biphenyl rings know as congeners. A PCB is typically a
mixture of 60 to 90 congeners. As the number of chlorines in a PCB
mixture increases the flash point rises and it becomes less
biodegradable.
Once in the
environment, PCBs tend to concentrate, or bioaccumulate, in animals
at the top of the food chain.
For a copy of EPA Method 1668A, click here
To download a copy
of a Horizon Technology Application Note on EPA Method 1668A, click
here. |
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