Magnetic multi-walled carbon nanotubes assisted dispersive solid phase extraction of nerve agents and their markers from muddy water

Pardasani, Deepak; Kanaujia, Pankaj K.; Purohit, Ajay Kumar; Shrivastava, Anchal Roy; Dubey, D. K.

doi:10.1016/j.talanta.2011.08.067

Cited by 108 publications

(34 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An increase in the butylamide silica amount would result in a lower dispersion between solid and phases and also higher desorption solution volumes would be needed. [32,35] In the case of volume and dispersion time variables, highest values are needed to promote the contact between the analyte and the solid. Additionally, the level selected of NaOH concentration in methanol must be highest to form negative charges which promote repulsion between the solid and SMX.…”

Section: Characterization Of the Solid Adsorbentmentioning

confidence: 99%

Dispersive solid-phase extraction based on butylamide silica for the determination of sulfamethoxazole in milk samples by capillary electrophoresis

Islas

Rodríguez

Páez-Hernández

et al. 2016

Journal of Liquid Chromatography & Related Technologies

View full text Add to dashboard Cite

A new method based on the combination of dispersive solid-phase extraction and capillary electrophoresis is proposed for the determination of sulfamethoxazole in milk samples. Butylamide silica was synthesized and used as extractant. Factors involved in sample treatment method such as: butylamide silica amount, NaOH concentration in methanol, sample volume, and dispersion time were evaluated using a Taguchi parameter design. Under optimal conditions, average recoveries ranged from 73 to 85% with a limit of detection of 0.05 mg L À 1 were achieved. The proposed method is a useful technique for cleanup milk samples. GRAPHICAL ABSTRACT

show abstract

Section: Characterization Of the Solid Adsorbentmentioning

confidence: 99%

Dispersive solid-phase extraction based on butylamide silica for the determination of sulfamethoxazole in milk samples by capillary electrophoresis

Islas

Rodríguez

Páez-Hernández

et al. 2016

Journal of Liquid Chromatography & Related Technologies

View full text Add to dashboard Cite

show abstract

“…However, it has not been reported to separate or extract ST with In this work, MSPE sorbents (Fe 3 O 4 @SiO 2 @ [OMIM] PF 6 ) were prepared, these sorbents have the property of the ionic liquids and (MNPs). When compared other studies, these MSPE sorbents provides a rapid, and efficient sample preparation process, which enables the treatment of large volume samples in a short period of time [15] …”

Section: Introductionmentioning

confidence: 99%

Magnetic Solid Phase Extraction Using Ionic Liquid Coated Magnetic Core Fe3O4@SiO2 Nanoparticles Followed by UV Spectrophotometry for Separation/Analysis of Safranine T in Food

Bakheet¹

2017

AJHC

View full text Add to dashboard Cite

Hydrophobic ionic liquids (IL) 1-octyl-3-methylimidazole hexafluorophosphate ([OMIM] PF 6 ) coatedFe 3 O 4 @SiO 2 nanoparticles was employed in magnetic solid phase extraction (MSPE) method coupled with ultraviolet visible spectrophotometry for the analysis of safranineT (ST). The results showed that safranineT was adsorbed fast by Fe 3 O 4 @SiO 2 @[OMIM] PF 6 and eluted by ethanol. Different parameters, such as; pH, temperature, ionic strength, eluent type, volume and temperature were studied. This method introduced wide linear range of 15-350 ng mL -1 , the correlation coefficient was 0.9991, the equations of calibration graph was A (absorbance) = 0.04+0.13c (µg mL -1 ), the detection limit was 0.37 ng mL -1 (RSD = 5.1%). The current method could be applied for the analysis of ST in food samples with satisfactory results.

show abstract

“…Several methods have previously been developed using mag-MWCNTs as the adsorbent for analysis of estrogens [21], nerve agents [22], aconitines [23] and so on. However, to the best of our knowledge, no methods based on mag-MWCNTs have been established for determination of SUs.…”

Section: Introductionmentioning

confidence: 99%

Determination of six sulfonylurea herbicides in environmental water samples by magnetic solid-phase extraction using multi-walled carbon nanotubes as adsorbents coupled with high-performance liquid chromatography

Jiang

et al. 2016

Journal of Chromatography A

105

View full text Add to dashboard Cite

a b s t r a c tMagnetic solid-phase extraction (MSPE) using magnetic multi-walled carbon nanotubes (mag-MWCNTs) as adsorbents, coupled with high-performance liquid chromatography-diode-array detector (HPLC-DAD), was developed for the simultaneous separation and determination of six types of sulfonylurea herbicides (SUs) in environmental water samples. Several variables affecting MSPE efficiency were systematically investigated, including the type and volume of desorption solvent, sample solution pH, salt concentration, amount of mag-MWCNTs, and extraction and desorption time. Response surface was employed to assist in the MSPE optimization. Under optimized conditions, excellent linearity was achieved in the range of 0.05-5.0 g/L for all six SUs, with coefficients of correlation r > 0.9994, and preconcentration factors ranging from 178 to 210. Limits of detection and quantification were 0.01-0.04 g/L and 0.03-0.13 g/L, respectively. The intra-day and inter-day precision (relative standard deviations, n = 6, %) at three spiked levels were 2.0-11.0% and 2.1-12.9% in terms of peak area, respectively. The method recoveries at three fortified concentrations were obtained within 76.7-106.9% for reservoir water samples and 78.2-105.4% for tap water samples. The developed MSPE-HPLC method demonstrated high sensitivity, repeatability, simplicity, rapidity, and excellent practical applicability.

show abstract

Magnetic multi-walled carbon nanotubes assisted dispersive solid phase extraction of nerve agents and their markers from muddy water

Cited by 108 publications

References 15 publications

Dispersive solid-phase extraction based on butylamide silica for the determination of sulfamethoxazole in milk samples by capillary electrophoresis

Dispersive solid-phase extraction based on butylamide silica for the determination of sulfamethoxazole in milk samples by capillary electrophoresis

Magnetic Solid Phase Extraction Using Ionic Liquid Coated Magnetic Core Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> Nanoparticles Followed by UV Spectrophotometry for Separation/Analysis of Safranine T in Food

Determination of six sulfonylurea herbicides in environmental water samples by magnetic solid-phase extraction using multi-walled carbon nanotubes as adsorbents coupled with high-performance liquid chromatography

Contact Info

Product

Resources

About

Magnetic multi-walled carbon nanotubes assisted dispersive solid phase extraction of nerve agents and their markers from muddy water

Cited by 108 publications

References 15 publications

Dispersive solid-phase extraction based on butylamide silica for the determination of sulfamethoxazole in milk samples by capillary electrophoresis

Dispersive solid-phase extraction based on butylamide silica for the determination of sulfamethoxazole in milk samples by capillary electrophoresis

Magnetic Solid Phase Extraction Using Ionic Liquid Coated Magnetic Core Fe&lt;sub&gt;3&lt;/sub&gt;O&lt;sub&gt;4&lt;/sub&gt;@SiO&lt;sub&gt;2&lt;/sub&gt; Nanoparticles Followed by UV Spectrophotometry for Separation/Analysis of Safranine T in Food

Determination of six sulfonylurea herbicides in environmental water samples by magnetic solid-phase extraction using multi-walled carbon nanotubes as adsorbents coupled with high-performance liquid chromatography

Contact Info

Product

Resources

About

Magnetic Solid Phase Extraction Using Ionic Liquid Coated Magnetic Core Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> Nanoparticles Followed by UV Spectrophotometry for Separation/Analysis of Safranine T in Food