Browse Prior Art Database

Single Reagent Fe(II) Analysis

IP.com Disclosure Number: IPCOM000085083D
Original Publication Date: 1976-Feb-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Grande, JA: AUTHOR [+4]

Abstract

A standard (and recommended EPA) procedure for Fe(II) analysis using 1,10 o- phenanthroline involves a two-step process for the final analysis steps. First, a measured amount of the color forming reagent is added, 1,10 o-phenanthroline, followed by the addition of a measured amount of buffer solution. If Fe(III) is present, it is first reduced to Fe(II) by various preliminary procedures; predominantly, hydroxylamine hydrochloride is used. After the above reagents are added, the solutions are allowed to sit at ambient temperatures for 5 - 10 minutes and the color is measured at 510nm.

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Single Reagent Fe(II) Analysis

A standard (and recommended EPA) procedure for Fe(II) analysis using 1,10 o- phenanthroline involves a two-step process for the final analysis steps. First, a measured amount of the color forming reagent is added, 1,10 o- phenanthroline, followed by the addition of a measured amount of buffer solution. If Fe(III) is present, it is first reduced to Fe(II) by various preliminary procedures; predominantly, hydroxylamine hydrochloride is used. After the above reagents are added, the solutions are allowed to sit at ambient temperatures for 5 - 10 minutes and the color is measured at 510nm.

It has been discovered that premixing the reagent and buffer into one solution as they are being prepared can be used for this analysis. In this case, each solution is prepared as per the standard procedure, mixes them together in the ratio prescribed by the standard procedure additions and uses this combined reagent in the analysis. The steps in the analysis then become dissolution of the iron sample or reduction of Fe(III) - Fe(II) followed by the addition of this single premixed reagent, wait 5 - 10 minutes and measuring at 510nm. One less step is involved in this procedure than by the standard procedure.

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