Method for the substantial reduction of quenching effects in luminescence spectrometry

Patent · Sun Jan 01 04:00:00 EST 1989

OSTI ID:867025

Demas, James N ^[1]; Jones, Wesley M ^[2]; Keller, Richard A ^[2]

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1. Charlottesville, VA
2. Los Alamos, NM

Method for reducing quenching effects in analytical luminescence measurements. Two embodiments of the present invention are described which relate to a form of time resolution based on the amplitudes and phase shifts of modulated emission signals. In the first embodiment, the measured modulated emission signal is substantially independent of sample quenching at sufficiently high frequenices. In the second embodiment, the modulated amplitude and the phase shift between the emission signal and the excitation source are simultaneously measured. Using either method, the observed modulated amplitude may reduced to tis unquenched value.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM
• DOE Contract Number: W-7405-ENG-36
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4845368
• OSTI ID: 867025
• Country of Publication: United States
• Language: English

Related Subjects

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amplitude
amplitudes
analytical
based
described
effects
embodiment
embodiments
emission
excitation
excitation source
form
frequenices
independent
luminescence
measured
measurements
method
modulated
observed
phase
phase shift
phase shifts
quenching
quenching effects
reduced
reducing
reduction
relate
resolution
sample
shift
shifts
signal
signals
simultaneously
simultaneously measure
source
spectrometry
substantial
substantial reduction
substantially
substantially independent
sufficiently
time
time resolution
tis
unquenched
value