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US 11,231,368 B2Granted
Ultra low range sulfite measurement
AssigneeHach Company
InventorAmit Das
Life of this patent
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Abstract
An embodiment provides a method for measuring sulfite in a solution, including: preparing a hemicyanine indicator; introducing the hemicyanine indicator to a solution containing an amount of sulfite, wherein the hemicyanine indicator reacts with the sulfite and causes a change in fluorescence of the solution; and measuring the amount of sulfite in the solution by measuring an intensity of the fluorescence. Other aspects are described and claimed.
Claims11
A composition for measuring sulfite in a solution, comprising:
- a hemicyanine indicator having the chemical formula:
A system for measuring sulfite in a solution, comprising:
- a hemicyanine indicator having the chemical formula:
- and
- a measurement device using the hemicyanine indicator to measure sulfite in the solution.
A method for measuring sulfite in a solution, comprising:
- preparing a hemicyanine indicator, wherein the hemicyanine indicator comprises the chemical formula:
- introducing the hemicyanine indicator to a solution containing an amount of sulfite, wherein the hemicyanine indicator reacts with the sulfite and causes a change in fluorescence of the solution;
- and
- measuring the amount of sulfite in the solution by measuring an intensity of the fluorescence.
1 more element
Dependencies are inferred from the claim text.