Manganese detection
AssigneeHach Company
InventorAngella Nicholle Greenawalt
Life of this patent
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Abstract
An embodiment a method for measuring an amount of manganese in an aqueous sample, including: reducing, using a dechlorination reagent, wherein the dechlorination reagent comprises iron(II) and potassium iodide; oxidizing, under an alkaline condition using sodium hydroxide, Mn(II) to Mn(IV) in the aqueous sample, and chelating, using etidronic acid (HEDP), Fe(II) and Fe(III) in the aqueous sample, oxidizing an amount of 3,3′,5,5′-tetramethylbenzidine (TMB) with Mn(IV); and measuring, using a colorimetric indicator, the amount of manganese within the aqueous sample, by measuring an absorbance intensity at a wavelength of the oxidized amount of 3,3′,5,5′-tetramethylbenzidine (TMB). Other aspects are described and claimed.
Claims8
A device for measuring an amount of manganese in an aqueous sample, comprising:
- a measurement chamber;
- and
- a memory device that stores instructions executable by the processor to measure, using a colorimetric indicator, the amount of manganese within the aqueous sample, by measuring an absorbance intensity at a wavelength of an oxidized amount of 3,3′,5,5′-tetramethylbenzidine (TMB) added to the aqueous sample, wherein the wavelength is predetermined, wherein the aqueous sample is reduced using a dechlorination reagent, wherein the aqueous sample further comprises an interferant selected from the group consisting of:
- free chlorine and a monochloramine species, wherein the dechlorination reagent comprises iron(II) and potassium iodide, wherein under an alkaline condition using sodium hydroxide oxidizes Mn(II) to Mn(IV) in the aqueous sample, wherein etidronic acid (HEDP) chelates Fe(II) and Fe(III) in the aqueous sample.
Dependencies are inferred from the claim text.