Radiant energy – Calibration or standardization methods
Patent
1988-08-08
1989-12-12
Howell, Janice A.
Radiant energy
Calibration or standardization methods
436 8, 436 19, 356300, 356243, G01D 1800, G01N 3100, G01J 102, G01J 300
Patent
active
048869651
ABSTRACT:
A method for determining the wavelength accuracy of a variable wavelength liquid chromatography detector in the low UV range comprising filling the cell of the detector with a test solution and varying the indicated wavelength of detection to find the indicated wavelength of maximum absorbance in a wavelength region around a reference wavelength of the test solution and then calculating the difference between the indicated wavelength of maximum absorbance and the reference wavelength to determine the accuracy of the indicated wavelength of the detector. The test solution contains terbium III ions in a solvent such as n-propanol so that the absorbance maximum of the test solution does not shift more than about 0.5 nm for a spectral bandpass ranging from 2 to 6 nm.
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National Bureau of Standards Certificate, Standard Reference Material 2034, Holmium Oxide Solution Wavelength Standard from 240 to 650 nm, Jun. 20, 1985.
Eisenberg Jacob
Halldorson Burke M.
Howell Janice A.
Stevens Timothy S.
The Dow Chemical Company
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