Light absorption cell combining variable path and length pump
- 2419 Dickey Rd., Augusta, GA 30906
A device for use in making spectrophotometric measurements of fluid samples. In particular, the device is a measurement cell containing a movable and a fixed lens with a sample of the fluid therebetween and through which light shines. The cell is connected to a source of light and a spectrophotometer via optic fibers. Movement of the lens varies the path length and also pumps the fluid into and out of the cell. Unidirectional inlet and exit valves cooperate with the movable lens to assure a one-way flow of fluid through the cell. A linear stepper motor controls the movement of the lens and cycles it from a first position closer to the fixed lens and a second position farther from the fixed lens, preferably at least 10 times per minute for a nearly continuous stream of absorption spectrum data.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States)
- DOE Contract Number:
- AC09-89SR18035
- Assignee:
- Prather, William S. (2419 Dickey Rd., Augusta, GA 30906)
- Patent Number(s):
- US 5268736
- OSTI ID:
- 869058
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
absorption
cell
combining
variable
path
length
pump
device
spectrophotometric
measurements
fluid
samples
particular
measurement
containing
movable
fixed
lens
sample
therebetween
shines
connected
source
spectrophotometer
via
optic
fibers
movement
varies
pumps
unidirectional
inlet
exit
valves
cooperate
assure
one-way
flow
linear
stepper
motor
controls
cycles
position
closer
farther
preferably
10
times
minute
nearly
continuous
stream
spectrum
data
continuous stream
spectrophotometric measurements
fluid sample
optic fiber
stepper motor
path length
cell containing
fluid samples
absorption spectrum
light absorption
optic fibers
motor control
spectrum data
variable path
cell contain
via optic
absorption cell
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