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US 11,789,031 B2Granted
Slope spectroscopy standards
AssigneeC Technologies AB
InventorsMark Salerno, I-Tsung Shih, Craig Harrison
Life of this patent
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Abstract
The present invention relates generally to a slope spectroscopy standards and methods of making slope spectroscopy standards, specifically standards and methods of developing standards specifically for variable pathlength (slope) measurements.
Claims18
A method for determining a state of fitness of a spectrophotometer comprising:
- testing the spectrophotometer by
- measuring absorbance values for a predetermined concentration of a standard at a predetermined wavelength and multiple pathlengths using variable path length spectroscopy;
- calculating a slope value of the standard from a linear regression of the absorbance values at the multiple pathlengths;
- comparing the calculated slope value to a certified slope value or to the corresponding slope value on a standard curve to determine the state of fitness of the spectrophotometer,
- wherein the standard is a methylxanthine or a compound selected from the group consisting of NaCl, KHP, KCl and KCr2O4.
2 more elements
A method for determining a state of fitness of a spectrophotometer comprising:
- testing the spectrophotometer by
- measuring absorbance values for a predetermined concentration of a standard at a predetermined wavelength and multiple pathlengths using variable path length spectroscopy;
- comparing the measured absorbance values at the multiple pathlengths to a predetermined linear regression of the standard and determining the correlation between the measured values and the predetermined values to determine the state of fitness of the spectrophotometer;
- wherein the standard is a methylxanthine or a compound selected from the group consisting of NaCl, KHP, KCl and KCr2O4.
1 more element
Dependencies are inferred from the claim text.