Kinetic method for the determination of trace amounts of copper(II) in water matrices by its catalytic effect on the oxidation of 1,5-diphenylcarbazide

Crespo, Gastón A.; Andrade, Francisco J.; Iñón, Fernando A.; Tudino, Mabel Beatríz

doi:10.1016/j.aca.2005.03.013

Cited by 25 publications

(13 citation statements)

References 16 publications

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“…At pH . 3.0, the reaction between Cr(VI) and DPC becomes too slow (Crespo et al 2005). In the current work, the color developing process is very fast, as shown in The absorbance as a function of the Cr(VI) concentration is shown in Figure 6.…”

Section: Resultsmentioning

confidence: 97%

Determination of Cr(VI) concentration in diluted samples based on the paper test strip method

Kong

2009

Water Science and Technology

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At present, there are many methods for Cr(VI) concentration determination in diluted samples, however, these methods have their own inherent drawbacks, such as long response time, complicated pretreatment, expensive equipment etc. In this paper, a paper-based test strip method specific for determination of diluted Cr(VI) samples was developed. In this method, Aliquat 336, as an anion exchanger was loaded into filter paper to form a test strip. This test strip was used to pre-concentrate Cr(VI) when contacting with the diluted Cr(VI)-containing solution. The Cr(VI)-containing test strip was then immersed into a diphenylcarbazide (DPC) solution (a color forming solution), and the color intensity was correlated to the Cr(VI) concentration. The detection range of the present method was found to be 0.02-1.50 mg/L. The results also showed that the method gave a high selectivity for Cr(VI) in the diluted samples to be tested. The method was applied to synthesized samples and the results, which were compared to those from a reference method, showed that the developed method is an effective, reliable way for Cr(VI) determination in diluted samples.

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Section: Resultsmentioning

confidence: 97%

Determination of Cr(VI) concentration in diluted samples based on the paper test strip method

Kong

2009

Water Science and Technology

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“…Ring-oven preconcentration with laser induced breakdown spectroscopy [48] and catalytic-kinetic-spectrophotometric method [49] also have good sensitivity, but these detection systems are complicated and need a combination of devices. Some fluorometry methods show low LODs, but their working ranges are quite narrow (ca.…”

Section: Methods Evaluation and Real Sample Analysismentioning

confidence: 99%

Selective extraction and release using (EDTA-Ni)-layered double hydroxide coupled with catalytic oxidation of 3,3′,5,5′-tetramethylbenzidine for sensitive detection of copper ion

Tang

Chang

Chia

et al. 2015

Analytica Chimica Acta

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“…(Dadfarnia et al, 2002;Fan et al, 2008;Feng et al, 2011;Navrátilová, 1991;Pflaum and Howick, 1956;Tunçeli and Türker, 2002). It is also a pH sensitive, reversible dye with pK a 8.5, and its absorption spectrum in solution significantly depends on pH (Crespo et al, 2005). DPCO shows a pale yellowish color in acid media and only an acid absorption band with maximum at 300 nm, while it shows a strong red color in basic solution with an intense absorption band at 495 nm.…”

Section: Absorption Spectra Of Dpco-zn 2 + Indicatormentioning

confidence: 97%

An irreversible planar optical sensor for multi-dimensional measurements of sedimentary H2S

2017

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Kinetic method for the determination of trace amounts of copper(II) in water matrices by its catalytic effect on the oxidation of 1,5-diphenylcarbazide

Cited by 25 publications

References 16 publications

Determination of Cr(VI) concentration in diluted samples based on the paper test strip method

Determination of Cr(VI) concentration in diluted samples based on the paper test strip method

Selective extraction and release using (EDTA-Ni)-layered double hydroxide coupled with catalytic oxidation of 3,3′,5,5′-tetramethylbenzidine for sensitive detection of copper ion

An irreversible planar optical sensor for multi-dimensional measurements of sedimentary H2S

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