Preliminary field demonstration of a fiber-optic TCE sensor. [Trichloroethylene (TCE)]
We have developed a differential-absorption fiber-optic sensor for use in groundwater and vadose zone monitoring of certain volatile organochlorines. The principle of detection is a quantitative, irreversible chemical reaction that forms visible light-absorbing products. The sensor has been evaluated against gas chromatographic (GC) standard measurements and has demonstrated accuracy and sensitivity sufficient for the environmental monitoring of trace levels of trichloroethylene (TCE) and chloroform. This sensor is currently under evaluation in monitoring well and vadose zone applications. In this paper, we describe the principles of the existing single measurement sensor technology and show preliminary field-test results. 3 refs., 8 figs.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6216108
- Report Number(s):
- UCRL-JC-105391; CONF-910123-13; ON: DE91008453; TRN: 91-008136
- Resource Relation:
- Conference: OE/LASE '91: 4th Society of Photo-Optical Instrumentation Engineers (SPIE) international symposium, Los Angeles, CA (USA), 20-25 Jan 1991
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
47 OTHER INSTRUMENTATION
GROUND WATER
MONITORING
MEASURING INSTRUMENTS
FIBER OPTICS
ORGANIC CHLORINE COMPOUNDS
DETECTION
ABSORPTION SPECTROSCOPY
COLOR
DESIGN
FIELD TESTS
REAGENTS
HYDROGEN COMPOUNDS
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANOLEPTIC PROPERTIES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SPECTROSCOPY
TESTING
WATER
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)
440600 - Optical Instrumentation- (1990-)