A data base for establishment of preanalytical holding times
Experiments aimed at precisely determining the preanalytical holding time for soil and water samples containing volatile organic compounds have been conducted. Three water samples, distilled water, surface water, and groundwater, as well as three soil samples, were fortified with a wide range of volatile organics. Aliquots of these samples were stored at three conditions for up to one year. Four replicates were analyzed by GC/MS at logarithmic time intervals. Objectives were to develop procedures for the preparation of the samples, to establish the holding time for each compound under each storage condition, and to develop or apply preservation techniques for the extension of the holding time. Most of the volatile organic compounds are stable for at least eight weeks, and probably beyond. Those which are not stable either undergo dehydrohalogenation (tetrachloroethane to trichloroethylene) or bacterial degradation (aromatics). This can be reduced or eliminated by the use of HCI as a preservative. Data on the stability of preserved samples will be presented. Results on the stability of volatiles in soil will also be reported. 10 tabs.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 7003832
- Report Number(s):
- CONF-870763-4; ON: DE88011402
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400102* -- Chemical & Spectral Procedures
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
510200 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALKYLATED AROMATICS
AROMATICS
BENZENE
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHROMATOGRAPHY
DATA BASE MANAGEMENT
GAS CHROMATOGRAPHY
GROUND WATER
HYDROCARBONS
HYDROGEN COMPOUNDS
MANAGEMENT
MASS SPECTROSCOPY
ORGANIC COMPOUNDS
OXIDATION
OXYGEN COMPOUNDS
SEPARATION PROCESSES
SOILS
SPECTROSCOPY
STABILITY
STYRENE
SURFACE WATERS
TOLUENE
VOLATILITY
WATER
XYLENES