Comparison of methods for collecting interstitial water for trace organic compounds and metals analyses
Several common materials and methods used to collect interstitial water (IW) were evaluated to determine their effect on the accuracy and precision of measured concentrations of selected organic compounds and metals. The concentration of pollutants in dosed seawater before and after exposure to stainless steel and Teflon centrifuge tubes, glass fiber and Nuclepore filters, cellulose dialysis membranes and fritted glass tubes were compared. Exposure to most hardware materials did not significantly affect the concentration of four metals (Cd, Cr, Cu, Pb) but there was significant loss (up to 79 percent) of two organic compounds (fluoranthene, p,p'-DDE) to almost all the hardware materials tested. Of five commonly used IW collection methods (centrifuging, centrifugal drainage or basal cup, squeezing, vacuum filtration and dialysis) investigated, the centrifuge method was judged the most accurate and precise for polycyclic aromatic hydrocarbons and PCBs. All IW collection methods tested showed high variability for the metals. As a result, with one exception (Cu), there was no significant difference detected in the accuracy of the methods for metals.
- Research Organization:
- Environmental Protection Agency, Newport, OR (United States). Environmental Research Lab.
- OSTI ID:
- 6452158
- Report Number(s):
- PB-93-199552/XAB; EPA-600/J-93/196
- Resource Relation:
- Other Information: Also pub. as Environmental Research Lab.-Narragansett, Newport, OR. Pacific Ecosystems Branch rept. no. CONTRIB-N-087. Pub. in Water Research, v26 n7 p989-995 1992. Prepared in cooperation with AScI Corp., McLean, VA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
INTERSTITIAL WATER
SAMPLING
SAMPLE HOLDERS
COMPARATIVE EVALUATIONS
ACCURACY
AROMATICS
CELLULOSE
CHEMICAL ANALYSIS
CONDENSED AROMATICS
DIALYSIS
DRAINAGE
EVALUATED DATA
FILTERS
FILTRATION
GLASS
MEMBRANES
METALS
POLLUTANTS
POLYCHLORINATED BIPHENYLS
POLYCYCLIC AROMATIC HYDROCARBONS
SEAWATER
SEDIMENTS
SORPTION
STATISTICAL DATA
TEFLON
TUBES
WATER POLLUTION
CARBOHYDRATES
CHLORINATED AROMATIC HYDROCARBONS
DATA
ELEMENTS
EVALUATION
FLUORINATED ALIPHATIC HYDROCARBONS
GROUND WATER
HALOGENATED ALIPHATIC HYDROCARBONS
HALOGENATED AROMATIC HYDROCARBONS
HYDROCARBONS
HYDROGEN COMPOUNDS
INFORMATION
MATERIALS
NUMERICAL DATA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLLUTION
POLY
POLYETHYLENES
POLYSACCHARIDES
POLYTETRAFLUOROETHYLENE
SACCHARIDES
SEPARATION PROCESSES
SYNTHETIC MATERIALS
WATER
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)