An optical sensing film for the determination of Co(II) based on disodium-1-nitroso-2-naphthol-3,6-disulfonate immobilized in chitosan film

Sombatsri, Sudarat; Wittayakun, Jatuporn; Sanai, Kochakriangkrai; Kajsanthia, K.; Prayoonpokarach, Sanchai

doi:10.1016/j.snb.2012.03.071

Cited by 11 publications

(9 citation statements)

References 25 publications

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“…Cellulose, silica gels, and polymer materials are most common used as solid substrates. In particular, optical sensors based on cellulose acetate membrane [7,8], XAD 7 resin [9], chitosan [10,11], and triacetylcellu lose membrane [12] are developed for the determina tion of cobalt. We have proposed to use a transparent polymethacrylate matrix for the immobilization of reagents without losing their ability to participate in analytical reaction with the analyte, accompanied by an optical effect with without losing the transparency of substrate [13].…”

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confidence: 99%

A colorimetric sensor based on a polymethacrylate matrix with immobilized 1-(2-pyridylazo)-2-naphthol for the determination of cobalt

2015

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A colorimetric sensor is proposed for the determination of cobalt. It is prepared by immobilizing 1 (2 pyridylazo) 2 naphthol (PAN) in an optically transparent polymethacrylate matrix. The conditions for determining cobalt by the proposed colorimetric sensor are found in the study of the complexation of cobalt with a PAN modified polymethacrylate matrix. The determination is based on the interaction of the sensor with a cobalt solution at pH 4 for 5 min, followed by the measurement of absorbance at 620 nm. The sensor ensures the determination of 0.05-0.50 mg/L of cobalt with the detection limit 0.03 mg/L. It is demonstrated that the sensor can be used for the determination of cobalt in the Cyanocobalamin medical preparation and potable water.

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confidence: 99%

A colorimetric sensor based on a polymethacrylate matrix with immobilized 1-(2-pyridylazo)-2-naphthol for the determination of cobalt

2015

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“…A comparison of the proposed procedure with other preconcentration systems which use various adsorbents for the determination of cobalt can be seen in (Table 6). Analytical features such as detection range, detection limits and precision are comparable to the methods presented in the literature [37,38,40,42,44,[46][47][48][49].…”

Section: Comparison With Other Methodsmentioning

confidence: 59%

Determination of Cobalt in Soils and Natural Waters Using Silica Gel Modified with Polyhexamethylene Guanidine and Nitroso-N-Salt

2018

AMSE

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Highly sensitive and simple method was developed for preconcentration and determination of trace amounts of cobalt in natural waters and soils using diffuse reflectance spectroscopy was developed. Method is based on the application of the new sorbent -silica gel sequentially modified with polyhexamethylene guanidine and 2-nitroso-1-naphthol-4-sulfonic acid sodium salt (nitroso-N-salt). Optimal conditions of solid-phase extraction of cobalt (II) such as stirring time, pH and volume of the solution, surface concentration of the reagent were determined. During sorption, intensively colored complex of cobalt (III) with nitroso-N-salt, that have a stripe in diffuse reflectance spectrum with maximum at 530 nm, was formed. Sorption-photometric method of cobalt determination directly in the sorbent phase by the color of its complex with nitroso-N-salt using diffuse reflectance spectroscopy was developed. The linearty of calibration curve depended on the surface concentration of nitroso-N-salt. For the surface concentration of nitroso-N-salt of 2.8 µmol g -1 the linearty was maintained in the concentration range of 0.05 -5.0 µg Co per 0.100 g of the sorbent, or 0.005 -0.50 µg mL -1 if the sorption was carried out from 10 mL of the solution. As the surface concentration of the reagent decreased, the range of linearty of the calibration curve narrowed. The detection limit was calculated as 0.01 μg per 0.100 g of the sorbent (or 1 ng mL -1 if the sorption was carried out from 10 mL of the solution) and didn't depend on the surface concentration of the reagent. Method was applied to the determination of cobalt in natural waters and soils. The accuracy of the results was confirmed by inductively coupled plasma optical emission spectroscopy and recovery test of spiked samples.In order to investigate desorption of the organic reagent SiO 2 -PHMG-NNS was treated with 0.001 -6.0 mol L -1 solutions of HCl, HNO 3 , or NaCl.

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“…Comparison with other methods A comparison of the proposed procedure with other preconcentration systems which use various adsorbents for the determination of cobalt can be seen in (Table 6). Analytical features such as detection range, detection limits and precision are comparable to the methods presented in the literature [37,38,40,42,44,[46][47][48][49].…”

Section: Preconcentration Of Cobalt (Ii) In Mini-columnmentioning

confidence: 59%

Determination of Cobalt in Soils and Natural Waters Using Silica Gel Modified with Polyhexamethylene Guanidine and Nitroso-N-Salt

2018

JCERP

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Highly sensitive and simple method was developed for preconcentration and determination of trace amounts of cobalt in natural waters and soils using diffuse reflectance spectroscopy was developed. Method is based on the application of the new sorbent – silica gel sequentially modified with polyhexamethylene guanidine and 2-nitroso1-naphthol-4-sulfonic acid sodium salt (nitroso-N-salt). Optimal conditions of solid-phase extraction of cobalt (II) such as stirring time, pH and volume of the solution, surface concentration of the reagent were determined. During sorption, intensively colored complex of cobalt (III) with nitroso-N-salt, that have a stripe in diffuse reflectance spectrum with maximum at 530 nm, was formed. Sorption-photometric method of cobalt determination directly in the sorbent phase by the color of its complex with nitroso-N-salt using diffuse reflectance spectroscopy was developed. The linearty of calibration curve depended on the surface concentration of nitroso-N-salt. For the surface concentration of nitroso-N-salt of 2.8 µmol g-1 the linearty was maintained in the concentration range of 0.05 – 5.0 µg Co per 0.100 g of the sorbent, or 0.005 – 0.50 µg mL-1 if the sorption was carried out from 10 mL of the solution. As the surface concentration of the reagent decreased, the range of linearty of the calibration curve narrowed. The detection limit was calculated as 0.01 μg per 0.100 g of the sorbent (or 1 ng mL-1 if the sorption was carried out from 10 mL of the solution) and didn’t depend on the surface concentration of the reagent. Method was applied to the determination of cobalt in natural waters and soils. The accuracy of the results was confirmed by inductively coupled plasma optical emission spectroscopy and recovery test of spiked samples.

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An optical sensing film for the determination of Co(II) based on disodium-1-nitroso-2-naphthol-3,6-disulfonate immobilized in chitosan film

Cited by 11 publications

References 25 publications

A colorimetric sensor based on a polymethacrylate matrix with immobilized 1-(2-pyridylazo)-2-naphthol for the determination of cobalt

A colorimetric sensor based on a polymethacrylate matrix with immobilized 1-(2-pyridylazo)-2-naphthol for the determination of cobalt

Determination of Cobalt in Soils and Natural Waters Using Silica Gel Modified with Polyhexamethylene Guanidine and Nitroso-N-Salt

Determination of Cobalt in Soils and Natural Waters Using Silica Gel Modified with Polyhexamethylene Guanidine and Nitroso-N-Salt

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