Infrared trace element detection system

Patent · Tue Nov 15 00:00:00 EST 1988

OSTI ID:7019993

Bien, F; Bernstein, L S; Matthew, M W

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): US 4785184; A
• Application Number: PPN: US 6-866891
• OSTI ID: 7019993
• Resource Relation: Patent File Date: 27 May 1986
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
FLUIDS
ABSORPTION SPECTROSCOPY
INFRARED SPECTROMETERS
SAMPLE HOLDERS
DESIGN
INFRARED RADIATION
OPERATION
TRACE AMOUNTS
ELECTROMAGNETIC RADIATION
MEASURING INSTRUMENTS
RADIATIONS
SPECTROMETERS
SPECTROSCOPY
400102* - Chemical & Spectral Procedures