Determination of cobalt, nickel and iron at trace level in natural water samples by in-column chelation-reversed phase high-performance liquid chromatography

Höl, Ayşen; Divrikli, Ümit; Elçi, Latif

doi:10.1007/s10661-011-2201-9

Cited by 14 publications

(6 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The residue metal ion was measured by a UV–vis spectrophotometer. Arsenazo (III) was used to measure La 3+ and Nd 3+ , , 4-(2-pyridylazo)resorcinol for Co 2+ and Ni 2+ , , and sodium diethyldithiocarbamate for Cu 2+ , respectively. The data were averaged from three independent measurements.…”

Section: Methodsmentioning

confidence: 99%

Magnetic Nanocomposite Hydrogel Prepared by ZnO-initiated Photopolymerization for La (III) Adsorption

Zheng

et al. 2014

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Here, we provide an effective method to fabricate magnetic ZnO clay nanocomposite hydrogel via the photopolymerization. The inorganic components endow the hydrogel with high mechanical strength, while the organic copolymers exhibit good adsorption capacity and separation selectivity to La (III) ions. An optimized hydrogel has the maximum compressive stress of 316.60±15.83 kPa, which still exhibits 138.98±7.32 kPa compressive strength after swelling. The maximum adsorption capacity of La ion is 58.8 mg/g. The adsorption matches the pseudo-second-order kinetics model. La (III) ions can be effectively separated from the mixtures of La/Ni, La/Co, La/Cu, and La/Nd in a broad pH range (2.0 to 8.0). After six adsorption-desorption cycles, the hydrogel can maintain its adsorption capacity. This work not only provides a new approach to the synthesis of tough hydrogels under irradiation, but also opens up enormous opportunities to make full use of magnetic nanocomposite hydrogels in environmental fields.

show abstract

Section: Methodsmentioning

confidence: 99%

Magnetic Nanocomposite Hydrogel Prepared by ZnO-initiated Photopolymerization for La (III) Adsorption

Zheng

et al. 2014

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…(35,36) This compound is a popular reagent applied in spectrophotometric, chelatometric, and colorimetric analyses owing to its ability to correlate with many different metals. (37)(38)(39)(40)(41)(42) The versatility of this compound may be due to its several reactive sites, such as a pyridyl nitrogen atom, an azo group, and an o-hydroxyl group. (43) The pyridyl group is derived from pyridine (C 5 H 5 N) by removing a hydrogen atom from a ring carbon atom.…”

Section: Introductionmentioning

confidence: 99%

Label-free Binding Analysis of 4-(2-Pyridylazo)-resorcinol-based Composite Layer with Cobalt Ion Using Surface Plasmon Resonance Optical Sensor

Saleviter¹,

Fen²,

Omar³

et al. 2020

Sensors and Materials

View full text Add to dashboard Cite

Label-free measurements of small-molecule binding interactions are of high interest to researchers across multiple scientific disciplines. Label-free optical sensors based on surface plasmon resonance (SPR) have been widely used for detecting various targets including toxic heavy metals in solutions. In this research, an SPR optical sensor enhanced with a 4-(2-pyridylazo)-resorcinol (PAR)-based composite layer was employed for the detection of the cobalt ion (Co 2+). A binding analysis study was conducted by monitoring the interaction between Co 2+ and the sensing layer thin film. In our experiment, there were no changes in SPR angle for a gold layer in contact with Co 2+ of different concentrations, whereas the enhanced SPR sensor produced a maximum SPR angle shift of 0.328°. From the relationship between the angle shift and the concentration of Co 2+ , the sensor had a sensitivity of 0.2375° ppm −1 for concentrations of less than 1 ppm, 0.0044° ppm −1 for concentrations of 1 to 10 ppm, and 0.00069° ppm −1 for concentrations from 10 to 100 ppm. Further analysis was also carried out by calculating the full width at half maximum (FWHM), detection accuracy (DA), and signal-tonoise ratio (SNR). In the binding analysis, the experimental results were fitted with Langmuir, Freundlich, and Sips isotherm equations. It was found that the Sips isotherm equation most closely fitted the experimental data with an R 2 value of 0.96716 and a binding affinity of 1.649 ppm −1 .

show abstract

“…To date, there have been various methods for the determination of Co 2+ concentration, such as chromatographic techniques, electrochemical methods, inductively coupled plasma, nanomaterials and fluorescence techniques . Colorimetric methods are a useful technology for monitoring analytes owing to their convenience, simplicity and naked‐eye observation compared with other analytical methods.…”

Section: Introductionmentioning

confidence: 99%

Colorimetric Co²⁺ sensor based on an anionic pyridylazo dye and a cationic polyelectrolyte in aqueous solution

Inoue

Aikawa

Sakamaki

et al. 2018

Polymer International

View full text Add to dashboard Cite

A new naked‐eye colorimetric sensor for detecting Co2+ in a pure aqueous solution at pH 7.0 was developed by mixing an anionic organic dye, 2‐(5‐bromo‐2‐pyridylazo)‐5‐(N‐propyl‐N‐sulfopropylamino)phenol (5‐Br‐PAPS) with a cationic polyelectrolyte, poly(diallyldimethylammonium chloride) (PDADMAC). Upon addition of Co2+, the absorption maximum exhibited a remarkable bathochromic shift from 426 to 635 nm (Δ = 209 nm) with a detectable color change from yellow, green to blue, while other metal ions did not induce such a change. The results showed that the 5‐Br‐PAPS and PDADMAC mixture can be used as a selective and sensitive naked‐eye colorimetric chemosensor for Co2+. This study afforded a simple strategy to construct a novel chemosensor by a simple mixture of an organic dye and an oppositely charged polyelectrolyte. © 2018 Society of Chemical Industry

show abstract

Determination of cobalt, nickel and iron at trace level in natural water samples by in-column chelation-reversed phase high-performance liquid chromatography

Cited by 14 publications

References 30 publications

Magnetic Nanocomposite Hydrogel Prepared by ZnO-initiated Photopolymerization for La (III) Adsorption

Magnetic Nanocomposite Hydrogel Prepared by ZnO-initiated Photopolymerization for La (III) Adsorption

Label-free Binding Analysis of 4-(2-Pyridylazo)-resorcinol-based Composite Layer with Cobalt Ion Using Surface Plasmon Resonance Optical Sensor

Colorimetric Co²⁺ sensor based on an anionic pyridylazo dye and a cationic polyelectrolyte in aqueous solution

Contact Info

Product

Resources

About

Determination of cobalt, nickel and iron at trace level in natural water samples by in-column chelation-reversed phase high-performance liquid chromatography

Cited by 14 publications

References 30 publications

Magnetic Nanocomposite Hydrogel Prepared by ZnO-initiated Photopolymerization for La (III) Adsorption

Magnetic Nanocomposite Hydrogel Prepared by ZnO-initiated Photopolymerization for La (III) Adsorption

Label-free Binding Analysis of 4-(2-Pyridylazo)-resorcinol-based Composite Layer with Cobalt Ion Using Surface Plasmon Resonance Optical Sensor

Colorimetric Co2+ sensor based on an anionic pyridylazo dye and a cationic polyelectrolyte in aqueous solution

Contact Info

Product

Resources

About

Colorimetric Co²⁺ sensor based on an anionic pyridylazo dye and a cationic polyelectrolyte in aqueous solution