Simultaneous Determination of Cobalt (II) and Nickel (II) By First Order Derivative Spectrophotometry in Micellar Media

Rohilla, Rajni; Gupta, Usha

doi:10.1155/2012/739891

Cited by 11 publications

(11 citation statements)

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“…Effect of Co 2+ ion concentration on phosphorescence intensity of Mn‐doped ZnS quantum dots. The concentration of Co 2+ ion were: 0, 2.0, 4.0, 6.0, 8.0, 10.0, 15.0, 25.0 and 37.5 µ m . Inset graph is Stern–Volmer plot of the Co(II) concentration dependence of phosphorescence intensity of N ‐acetyl‐ l ‐cysteine‐capped Mn‐doped ZnS quantum dots.…”

Section: Resultsmentioning

confidence: 99%

“…There has been intense interest in the study of cobalt in environmental and biological samples. Many methods have been used for the determination of Co 2+ ion, including cyclic voltammetry , spectrophotometry , electrothermal atomic absorption spectrometry and fluorimetry . However, these methods suffer from limitations of long extraction time, expensive cost of maintenance, complicated operation and strong interferences from various ions .…”

Section: Introductionmentioning

confidence: 99%

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A novel phosphorescence sensor for Co²⁺ ion based on Mn‐doped ZnS quantum dots

Bian

Liu

et al. 2013

Luminescence

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N-acetyl-L-cysteine-capped Mn-doped ZnS quantum dots (QDs) were prepared by hydrothermal methods. It could emit phosphorescence at 583 nm with the excitation wavelength at 315 nm. The phosphorescence intensity of QDs could be quenched dramatically by increasing the concentration of Co(2+) ion. The novel phosphorescence sensor based on N-acetyl-L-cysteine-capped QDs was developed for detecting Co(2+) ion with a linear dynamic range of 1.25 × 10(-6) -3.25 × 10(-5) m. The limit of detection and RSD were 6.0 × 10(-8) m and 2.3%, respectively. Interference experiments showed excellent selectivity over numerous cations such as alkali, alkaline earth and transitional metal ions. The possible quenching mechanism was also examined by phosphorescence decays. The proposed phosphorescence method was further applied to the trace determination of Co(2+) ion in tap and pond water samples with recoveries of 97.75-103.32%.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A novel phosphorescence sensor for Co²⁺ ion based on Mn‐doped ZnS quantum dots

Bian

Liu

et al. 2013

Luminescence

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“…Comparando os resultados para determinação de cobalto em preparações farmacêuticas e em outras matrizes, [41][42][43][44][45][46][47][48] observa-se que embora o limite de detecção da metodologia proposta seja mais elevado, a determinação de cobalto nas formulações farmacêuticas estudadas apresentou resultado satisfatório e livre de interferentes. Além disso, as amostras apresentaram a quantidade do analito declarado pelo fabricante estando de acordo com as normas estabelecidas pela ANVISA.…”

Section: Conclusãounclassified

Determination of Co(II) in Pharmaceutical Formulations and Evaluation of Formed Species During Complexation by UV-Vis with Br-TDB

Migues¹,

Yamaki²

2014

Revista Virtual De Química

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, respectively. The analytical curve presented an unusual pattern with negative angular coefficient. The pattern is intrinsic to the complexation system with Br-TDB, once the same behavior was observed in determination of manganese, lead, cadmium and iron ions by UV-Vis. The methodology was validated by ICP OES. The o e t atio of o alt i a al zed d ug sa ples as oi ide t ith a ufa tu e 's i fo atio . Moreover, both UV-Vis and ICP OES yielded similar results at a confidence level ρ<0.05.

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“…Complex reaction between histamine, Co(II) and oxalate has been reported [18] with the complex structure shown (Figure 1), but it has not given a significant change of wavelength and solution color. On the other hand, alizarin red S (ARS) with chemical structure shown ( Figure 2) is well known to form colored complex with metallic and organic compounds such as Al(III) [19], Cu [20], Co and Ni [21], Cu, Co, Ni and cysteine [22], and Ni-histamine [23] with a wide range of ARS solvents. Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Rapid Spectrophotometric Method for Histamine Determination in Fish Using Alizarin Red S and Metal

2019

MJAS

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An analytical method for the determination of histamine using metals and alizarin red S (ARS) reagents by UV-Visible spectrophotometry was developed. Cu(II), Co(II) and ARS were used to form colored complex with histamine. The developed method was used to detect qualitatively and quantitatively the presence of histamine. Absorbance of Cu(II) and Co(II) complex were measured at a maximum wavelength of 505.5 and 567 nm, respectively. Optimization of analytical parameters such as concentration of metals, concentration of ARS, sample solution pH, and optimum time for complex formation were performed. Experimental results showed that the optimum concentration of Cu(II) was 50 ppm, 75 ppm ARS, sample solution pH 6, and 15 minutes optimum time, while the optimum concentration of Co(II) was 125 ppm, ARS was 75 and 50 ppm, sample solution pH 5 and 10 minutes optimum time. Method validation indicated that the coefficient of variation, limit of detection (LOD) (S/N =3), and limit of quantitation (LOQ = 10S/N) of Cu(II) were 0.65%, 8.94 ppm, and 29.82 ppm respectively with a sensitivity of 0.0054 ppm and linearity of 0.9959. Accuracy of histamine determination through Cu-ARS-histamine complex at a concentration of 50, 100, and 150 ppm were 105.7% (RSD = 0.777%, n = 3), 105.06% (RSD = 0.606%, n = 3), and 94.12% (RSD = 0.767%, n = 3), respectively. Meanwhile, the CV, LOD, and LOQ of Co(II) were 0.28%; 2.58 ppm; and 8.6 ppm respectively with a sensitivity of 0.0006 ppm and linearity of 0.9965. Accuracy of histamine determination through Co-ARS-histamine complex at a concentration of 50, 75, and 125 ppm were 98.33%, 95.83%, 93.88%, respectively. The proposed method was successfully applied to the determination of histamine in a fish sample with quantitative recovery; for Cu(II) complex (99.23%) and Co(II) complex (102.62%).

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Simultaneous Determination of Cobalt (II) and Nickel (II) By First Order Derivative Spectrophotometry in Micellar Media

Cited by 11 publications

References 0 publications

A novel phosphorescence sensor for Co²⁺ ion based on Mn‐doped ZnS quantum dots

A novel phosphorescence sensor for Co²⁺ ion based on Mn‐doped ZnS quantum dots

Determination of Co(II) in Pharmaceutical Formulations and Evaluation of Formed Species During Complexation by UV-Vis with Br-TDB

Rapid Spectrophotometric Method for Histamine Determination in Fish Using Alizarin Red S and Metal

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Simultaneous Determination of Cobalt (II) and Nickel (II) By First Order Derivative Spectrophotometry in Micellar Media

Cited by 11 publications

References 0 publications

A novel phosphorescence sensor for Co2+ ion based on Mn‐doped ZnS quantum dots

A novel phosphorescence sensor for Co2+ ion based on Mn‐doped ZnS quantum dots

Determination of Co(II) in Pharmaceutical Formulations and Evaluation of Formed Species During Complexation by UV-Vis with Br-TDB

Rapid Spectrophotometric Method for Histamine Determination in Fish Using Alizarin Red S and Metal

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A novel phosphorescence sensor for Co²⁺ ion based on Mn‐doped ZnS quantum dots

A novel phosphorescence sensor for Co²⁺ ion based on Mn‐doped ZnS quantum dots