Colorimetric Determination of Nickel with Alpha-Furildioxime

Gahler, A. R.; Mitchell, Alec Duncan; Mellon, M. G.

doi:10.1021/ac60051a032

Cited by 14 publications

(3 citation statements)

References 5 publications

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“…This is due to deprotonation of furildioxime at higher pH which favors the formation of complex with positively charged Ni 2+ . The same trend is reported for extraction systems and complexation in aqueous medium, this shows that pH-dependant chemistries are not altered in micellar medium [ 20 ]. For all subsequent measurements, 0.2 M buffer (NH 4 Cl/NaOH) at pH 9.0 was used.…”

Section: Resultssupporting

confidence: 79%

Single-Channel Flow Injection Spectrophotometric Determination of Nickel Using Furildioxime in Micellar Solution

Memon

Solangi

et al. 2012

The Scientific World Journal

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A very simple, selective, and fast flow injection spectrophotometeric method is developed for determination of nickel using furildioxime as complexing agent. Micellar solution of brij-35 is employed to solubilize the sparingly soluble complex of Ni-furildioxime in buffered aqueous system (pH-9.00). Under optimized conditions, absorbance is linear from 0.02 to 10 μg mL−1 using 500 μL sample volume and from 10 to 30 μg mL−1 using 50 μL sample volume of nickel at 480 nm, with R 2 = 0.9971 and 0.9916, respectively. The molar absorption coefficient and Sandell's sensitivity were 6.0 × 103 L mol−1 cm−1 and 0.01 ng cm−2, respectively. The sample throughput of the method is 120 samples per hour with RSD of 0.01–0.2% for 0.02 to 10 μg mL−1 nickel (n = 5), indicating that the method is highly precise and reproducible. Interference from cobalt is removed by Nitroso R-salt-modified XAD-16. The developed method is validated by analysing certified reference materials and is applied to assess nickel content of commercially available cigarettes.

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Section: Resultssupporting

confidence: 79%

Single-Channel Flow Injection Spectrophotometric Determination of Nickel Using Furildioxime in Micellar Solution

Memon

Solangi

et al. 2012

The Scientific World Journal

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show abstract

“…The results are summarized in Figure 2. The following conclusions may be drawn: Chloride solutions of nickel will not extract when neutralized with sodium hydroxide: conversion of the chloride solutions to perchlorate, prior to neutralization with sodium hydroxide, results in the narrow pH dependence previously reported (5). Strong color development as well as extraction over a wide pH range occurs after prior addition of ammonium hydroxide; and with perchlorate solutions, the single use of ammonium hydroxide is prevented because of the buffering action at pH 8.5 from slightly soluble ammonium perchlorate.…”

Section: Rapid Decomposition Proceduresmentioning

confidence: 78%

“…The spectral curve of the chloroform solution is shown in Figure 1. Gahler et al (5) recommended an optimum pH range of 7.5 to 8.3, which Sandell subsequently recognized as "surprisingly narrow"' (8). Taylor reports (11) using the reagent in ammoniacal solution.…”

Section: Rapid Decomposition Proceduresmentioning

confidence: 99%