Fiber optic probe for light scattering measurements
- Evans, GA
- Aiken, SC
- Augusta, GA
A fiber optic probe and a method for using the probe for light scattering analyses of a sample. The probe includes a probe body with an inlet for admitting a sample into an interior sample chamber, a first optical fiber for transmitting light from a source into the chamber, and a second optical fiber for transmitting light to a detector such as a spectrophotometer. The interior surface of the probe carries a coating that substantially prevents non-scattered light from reaching the second fiber. The probe is placed in a region where the presence and concentration of an analyte of interest are to be detected, and a sample is admitted into the chamber. Exciting light is transmitted into the sample chamber by the first fiber, where the light interacts with the sample to produce Raman-scattered light. At least some of the Raman-scattered light is received by the second fiber and transmitted to the detector for analysis. Two Raman spectra are measured, at different pressures. The first spectrum is subtracted from the second to remove background effects, and the resulting sample Raman spectrum is compared to a set of stored library spectra to determine the presence and concentration of the analyte.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States)
- DOE Contract Number:
- AC09-89SR18035
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 5404218
- OSTI ID:
- 869820
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fiber optic probe for light scattering measurements
Use of a fiber optic probe for organic species determination
Related Subjects
optic
probe
light
scattering
measurements
method
analyses
sample
inlet
admitting
interior
chamber
optical
transmitting
source
detector
spectrophotometer
surface
carries
coating
substantially
prevents
non-scattered
reaching
placed
region
presence
concentration
analyte
detected
admitted
exciting
transmitted
interacts
produce
raman-scattered
received
analysis
raman
spectra
measured
pressures
spectrum
subtracted
remove
background
effects
resulting
compared
set
stored
library
determine
sample chamber
raman-scattered light
transmitting light
light scattering
scattered light
fiber optic
optical fiber
interior surface
optic probe
raman spectra
raman spectrum
exciting light
scattering measurements
scattering analyses
substantially prevent
/356/