Light absorption cell combining variable path and length pump

Patent · Fri Jan 01 04:00:00 EST 1993

OSTI ID:869058

Prather, William S ^[1]

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1. 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: WESTINGHOUSE SAVANNAH RIVER CO
• 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

Related Subjects

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10
absorption
absorption cell
absorption spectrum
assure
cell
cell contain
cell containing
closer
combining
connected
containing
continuous
continuous stream
controls
cooperate
cycles
data
device
exit
farther
fibers
fixed
flow
fluid
fluid sample
fluid samples
inlet
length
lens
light
light absorption
linear
measurement
measurements
minute
motor
motor control
movable
movement
nearly
one-way
optic
optic fiber
optic fibers
particular
path
path length
position
preferably
pump
pumps
sample
samples
shines
source
spectrophotometer
spectrophotometric
spectrophotometric measurements
spectrum
spectrum data
stepper
stepper motor
stream
therebetween
times
unidirectional
valves
variable
variable path
varies
via
via optic