Infrared trace element detection system
An infrared trace element detection system includes an optical cell into which the sample fluid to be examined is introduced and removed. Also introduced into the optical cell is a sample beam of infrared radiation in a first wavelength band which is significantly absorbed by the trace element and a second wavelength band which is not significantly absorbed by the trace element for passage through the optical cell through the sample fluid. The output intensities of the sample beam of radiation are selectively detected in the first and second wavelength bands. The intensities of a reference beam of the radiation are similarly detected in the first and second wavelength bands. The sensed output intensity of the sample beam in one of the first and second wavelength bands is normalized with respect to the other and similarly, the intensity of the reference beam of radiation in one of the first and second wavelength bands is normalized with respect to the other. The normalized sample beam intensity and normalized reference beam intensity are then compared to provide a signal from which the amount of trace element in the sample fluid can be determined. 11 figs.
- Research Organization:
- Spectral Sciences Inc
- DOE Contract Number:
- AC02-83ER80085
- Assignee:
- Spectral Sciences, Inc., Burlington, MA (United States)
- Patent Number(s):
- A; US 4785184
- Application Number:
- PPN: US 6-866891
- OSTI ID:
- 7019993
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400102* -- Chemical & Spectral Procedures
ABSORPTION SPECTROSCOPY
DESIGN
ELECTROMAGNETIC RADIATION
FLUIDS
INFRARED RADIATION
INFRARED SPECTROMETERS
MEASURING INSTRUMENTS
OPERATION
RADIATIONS
SAMPLE HOLDERS
SPECTROMETERS
SPECTROSCOPY
TRACE AMOUNTS