EDTA Titration of Total Iron in Iron(II) and Iron(III) Mixtures.  Application to Iron Driers

Lucchesi, Claude A.; Hirn, C. F.

doi:10.1021/ac60165a044

Cited by 17 publications

(10 citation statements)

References 3 publications

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“…A number of instances have been reported by Lorenz and coworkers in which a substance reacting at an electrode is adsorbed substantially (12)(13)(14). It has been suggested that such reactant adsorption may play an important role in the kinetics of electrode reactions (4, [6][7][8][9]IS,16), so that the nature and properties of adsorbed reactants are of general interest.…”

Section: Discussionmentioning

confidence: 99%

“…Since Fe(III) slowly forms a stable methylthymol blue complex, it was suggested that ascorbic acid reduced any Fe(III) produced from the Fe(III)-EDTA equilibrium and thus prevented blocking of the indicator. Lucchesi and Hirn (8) determined the sum of Fe(III) and Fe(II) by adding excess standard EDTA at pH 2.0, raising the pH to 9.0, and back-titrating with standard zinc. Frio chrome Black T was used as the indicator, but the solution had to be at least 50% ethyl alcohol to prevent formation of the more stable Fe(III)-…”

mentioning

confidence: 99%

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Stepwise Titration of Iron(III) and Iron(II) with EDTA and Ferricyanide. The Square Wave Titrimetric End Point

Hall¹,

Flanigan²

1961

Anal. Chem.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Stepwise Titration of Iron(III) and Iron(II) with EDTA and Ferricyanide. The Square Wave Titrimetric End Point

Hall¹,

Flanigan²

1961

Anal. Chem.

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“…EDTA determination of iron content was modified from previously described ( 93 ). A standard curve was created using Fe(NH 4 ) 2 (SO 4 ) 2 •6H 2 O.…”

Section: Methodsmentioning

confidence: 99%

The Oxidative Stress-Induced Hypothetical Protein PG_0686 in Porphyromonas gingivalis W83 Is a Novel Diguanylate Cyclase

et al. 2023

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“…This color, a reaction product with Ferrozine, could be caused by Fe(II) impurities in either the Fe(III) sample or the paper. 47 We minimized the background signal by incorporating ethylenediaminetetraacetic acid (EDTA) in the Ferrozine side of the sample distribution layer. 48 We tested both the effect of different EDTA and Ferrozine concentrations on the signal to background ratio (Table S3, Table S4).…”

Section: Iron (Fe(iii))mentioning

confidence: 99%

Generating signals at converging liquid fronts to create line-format readouts of soluble assay products in three-dimensional paper-based devices

Abdullah

Wilson

Mora

et al. 2023

Preprint

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The correct interpretation of the result from a point-of-care device is crucial for an accurate and rapid diagnosis and to guide subsequent treatment. Lateral flow tests (LFTs) use a well- established format that was designed to simplify the user experience. However, the LFT device architecture is inherently limited to detecting analytes that can be captured by molecular recognition. Microfluidic paper-based analytical devices (μPADs), like LFTs, have the potential to be used in diagnostic applications at the point of care. However, μPADs have not gained significant traction outside of academic laboratories, in part, because they have often demonstrated a lack of homogeneous shape or color in signal outputs, which consequently can lead to inaccurate interpretation of results by users. Here, we demonstrate a new class of μPADs that generate colorimetric signals at the interfaces of converging liquid fronts (i.e., lines) to control where colorimetric signals are formed without relying on capture techniques. We demonstrate our approach by developing assays for three classes of analytes—an ion, an enzyme, and a small molecule—using iron (III), acetylcholinesterase, and lactate, respectively. Additionally, we show these devices have the potential to support multiplexed assays by generating multiple lines in a common readout zone. These results highlight the ability of this new paper-based device architecture to aid the interpretation of assays that create soluble products by using flow to constrain those colorimetric products in a familiar, line-format output.

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EDTA Titration of Total Iron in Iron(II) and Iron(III) Mixtures. Application to Iron Driers

Cited by 17 publications

References 3 publications

Stepwise Titration of Iron(III) and Iron(II) with EDTA and Ferricyanide. The Square Wave Titrimetric End Point

Stepwise Titration of Iron(III) and Iron(II) with EDTA and Ferricyanide. The Square Wave Titrimetric End Point

The Oxidative Stress-Induced Hypothetical Protein PG_0686 in Porphyromonas gingivalis W83 Is a Novel Diguanylate Cyclase

Generating signals at converging liquid fronts to create line-format readouts of soluble assay products in three-dimensional paper-based devices

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