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
May 1995
4. TITLE AND SUBTITLE
5. FUNDING NUMBERS
Preservation of Water Samples Containing Nitroaromatics and Nitramines
6. AUTHORS
Thomas F. Jenkins, Philip G. Thorne, Erika F. McCormick and Karen F. Myers
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 95-16
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 21010-5401
SFIM-AEC-ET-CR-95009
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 was conducted to develop a method for stabilizing water samples to be analyzed for nitroaromatic and
nitramine explosives using SW846 Method 8330. Several options were tested using river water fortified with 15
nitroaromatic, nitramine, and aminonitroaromatic analytes. Acidification to pH 2 using sodium bisulfate was
selected based on its ability to retard microbiological and chemical transformations, its ease of use under field
conditions, and its usability with both the direct and preconcentration procedures in Method 8330. Holding-time
studies were performed over a 64-day storage period using fortified river water and groundwaters with and
without chemical stabilization. Nonacidified samples showed rapid loss of tetryl, TNB, and TNT and slower loss
of the dinitroaromatics. These losses were accompanied by increasing concentrations of transformation products.
Losses of these nitroaromatics were completely eliminated by acidification to pH 2. Nitramines were stable over
the entire period whether samples were acidified or not. A small loss of the aminodinitroaromatics was observed
for both acidified and unacidified samples. The rate of loss for acidified samples was initially greater than for
nonacidified samples. Sample acidification caused no adverse effects on SW846 Method 8330, although samples
to be preconcentrated using salting-out solvent extraction should be neutralized prior to extraction to prevent
additional loss of aminodinitroaromatics.
14. SUBJECT TERMS
15. NUMBER OF PAGES
38
Acidification
RDX
Water
16. PRICE CODE
Analysis
Preservation
TNT
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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