TITLE
Field Study Results for VOCs with the Perkin-Elmer Sequential Tube
Sampler


AUTHOR(S)
Maribel Colon and William A. McClenny, Keith G. Kronmiller,
Christopher R. Fortune, and E. Hunter Daughtrey, Jr.

PERFORMING ORGANIZATION NAME AND ADDRESS
National Exposure Research Laboratory
Office of Research and Development
U.S. Environmental Protection Agency
Research Triangle Park, NC 27711

ManTech Environmental Technology, Inc.
2 Triangle Drive
Research Triangle Park, NC 27711

SPONSORING AGENCY NAME AND ADDRESS
National Exposure Research Laboratory
Office of Research and Development
U.S. Environmental Protection Agency
Research Triangle Park, NC 27711

ABSTRACT
Two Perkin-Elmer Sequential Tube Samplers (Model STS-25) were
evaluated for their performance, portability, and convenience of
operation.  Results obtained from both samplers and from a
collocated Summa-polished stainless steel canister were compared
for seven 3-h periods at three sites.  Special attention was given
to the monitoring of carbonyl sulfide and carbon disulfide.  The
samplers were loaded with three sampling tubes, each one packed
with 70 mg of Carboxen 1000 (60/80 mesh) and 160 mg of Carbotrap
graphitized carbon black (20/40 mesh).  An identical tube was used
as a field blank.  Each tube collected 1200 cm3 of ambient air (20
cm3/min for 60 min).  At the end of each sampling period, tubes
were sealed and stored in a capped glass tube to prevent
contamination and for transportation to a mobile laboratory for
analysis.  Advantages for the use of the STS-25 are low cost,
portability, ease of use, and a design suitable for obtaining sub-
part-per-billion detection limits with a standard analytical
finish.  Disadvantages are that it is a *one-short* technique and
no universal solid adsorbent material exists.