Form Approved
REPORT DOCUMENTATION PAGE
OMB No. 0704-0188
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1. AGENCY USE ONLY (Leave blank)
2. REPORT DATE
3. REPORT TYPE AND DATES COVERED
January 1997
4. TITLE AND SUBTITLE
5. FUNDING NUMBERS
Sampling Trace-Level Organics With Polymeric Tubings:
Dynamic Studies
6. AUTHORS
Louise V. Parker and Thomas A. Ranney
7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)
8. PERFORMING ORGANIZATION
REPORT NUMBER
U.S. Army Cold Regions Research and Engineering Laboratory
72 Lyme Road
Special Report 97-2
Hanover, New Hampshire 03755-1290
9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)
10. SPONSORING/MONITORING
AGENCY REPORT NUMBER
U.S. Army Environmental Center
Aberdeen Proving Ground, Maryland
SFIM-AEC-ET-CR-96160
11. SUPPLEMENTARY NOTES
12a. DISTRIBUTION/AVAILABILITY STATEMENT
12b. DISTRIBUTION CODE
Approved for public release; distribution is unlimited.
Available from NTIS, Springfield, Virginia 22161.
13. ABSTRACT (Maximum 200 words)
This study is the second phase of a two-year effort to determine the effects that sampling tubings have on
organic analyte concentrations. In the first year, 20 different tubings were compared, under static conditions,
with respect to sorption of organic contaminants and leaching of organic constituents. In this study, we exam-
ined what occurs under dynamic conditions when TCE-contaminated water is pumped through several differ-
ent types of polymeric tubings. Sorption of organic solutes, leaching of organic constituents, and desorption of
sorbed organic contaminants were all examined.
Five tubings were selected for this study: a rigid fluoropolymer, a flexible fluoropolymer, low-density poly-
ethylene (LDPE), and two plasticized polypropylene tubings. These materials were selected because our static
studies had shown that these tubings leached little or no organic constituents (as determined by HPLC analy-
ses with an ultraviolet [UV] detector) and ranged from being the least sorptive tubings tested to among the
most highly sorptive. The effects of tubing length and flow rate were examined.
Results from these studies indicate that if water is pumped through tubing at a slow flow rate (100 mL/
min), fluoropolymers should be used to prevent extensive losses of TCE and more sorptive analytes, especially
if the tubing is 50 ft or longer. If a faster flow rate (1 L/min) is used, it appears that LDPE tubing can be used to
sample TCE and other less sorptive analytes, although time for equilibration (24 hr) should be allowed to re-
duce losses in the deepest wells.
14. SUBJECT TERMS
15. NUMBER OF PAGES
25
See reverse
16. PRICE CODE
17. SECURITY CLASSIFICATION
18. SECURITY CLASSIFICATION
19. SECURITY CLASSIFICATION
20. LIMITATION OF ABSTRACT
OF REPORT
OF THIS PAGE
OF ABSTRACT
UNCLASSIFIED
UNCLASSIFED
UNCLASSIFIED
UL
Standard Form 298 (Rev. 2-89)
NSN 7540-01-280-5500
Prescribed by ANSI Std. Z39-18
298-102
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