The VOC Sampler is specifically designed to
collect non-aerated samples in 40-mL glass septum
vials for determination of volatile organic
compounds. Most VOC's are man-made compounds that
are components of gasoline by-products of
chlorinating drinking water or solvents. A newly
developed VOC Sampler designed by the USGS is used
to collect stream water samples for VOC analysis.
This sampler is made of non-contaminating materials
(stainless steel and refrigeration-grade copper)
that will not sorb the analytes of interest, can
collect a sample representative of environment
conditions in most streams. An important function of
the sampler design is to evacuate air and other
gases from the sampler before collecting a sample.
The VOC sampler weighs 11 lb. and can be suspended,
by hand, from a short rope or chain while wading a
stream. However, when sampling during periods of
high flow,
10 lb. weights can be added to keep the sampler
vertical when it is suspended from a bridge or
cableway.
The Sampler is designed to collect a sample at a
single point in the stream. The stainless-steel
sampler holds four 40 mL vials.
The sampler begins to fill as soon as it enters
the stream; however, the final sample is retained in
the vial during the last 15 to 20 seconds of the
filling process. A cover over the inlet ports
prevents contamination from surface oil and debris
when the sampler is removed from the stream. Samples
should be removed from the sampler, processed, and
capped streamside to avoid possible contaminants in
the vehicle.
601-115
VOC Sampler 15 lbs.
601-116
Vial, glass, amber septum, 40 milliliter (case 12)
1.5 lbs.
601-117
Rope, nylon, 1/4 inch diameter (20 ft.) 2 lbs.
601-118
10 lb. Weight 12 lbs.
