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
February 1996 (rev. October 1996)
4. TITLE AND SUBTITLE
5. FUNDING NUMBERS
Sampling Trace-Level Organics with Polymeric Tubings
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 96-3
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-95072
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)
There is concern whether tubings used to sample groundwater can affect contaminant concentrations. Tubings
might sorb contaminants, thereby giving falsely low values, or they might leach contaminants, thereby giving
falsely high values. There also is concern that a tubing used previously in a well with high concentrations of
contaminants might subsequently desorb contaminants into samples taken from other wells if decontamina-
tion is insufficient. Our review of the literature indicated that these concerns are valid, although a comprehen-
sive study of this subject does not exist. In our laboratory study, we looked for sorption of a suite of organic
solutes by 20 polymeric tubings under static conditions. Seven of these tubings were flexible and the others
were rigid. We found that among the rigid tubings tested, the three fluoropolymers (fluorinated ethylene pro-
pylene [FEP], FEP-lined polyethylene, and polyvinylidene fluoride [PVDF]) were the least sorptive tubings.
However, even these tubings readily sorbed some of the analytes. Among the flexible tubings tested, a fluo-
roelastomer tubing and a tubing made of a copolymer of vinylidene fluoride and hexafluoropropylene
(P[VDF-HFP]) were the least sorptive. We also found that several of the 20 tubings appeared to leach constitu-
ents into the test solution. We were unable to detect any evidence that constituents leached from the polyeth-
ylene tubings, the rigid fluoropolymer tubings, and one of the plasticized polypropylene tubings. Currently,
we are conducting studies to see whether the effects we observed in this study increase, decrease, or remain
the same under dynamic conditions.
14. SUBJECT TERMS
15. NUMBER OF PAGES
37
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
UNCLASSIFIED
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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