A novel spectrofluorometric method for the determination of methiocarb using an amphiphilic p-sulfonatocalix[4]arene

Ding, Xueping; Tang, Dongbao; Li, Tao; Wang, Sufan; Zhou, Yue

doi:10.1016/j.saa.2011.05.038

Cited by 12 publications

(10 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Calixarenes (Beata et al 2013;Korchowiec et al 2013), a supramolecular host system, have a rigid conformation due to their preformed hydrophobic cavities and have received considerable attention because of their ability to form inclusion compounds with a great variety of guests (Ö zkınalı and Kocaokutgen et al 2013; X. P. Ding et al 2011;Chen, Chen, and Diao 2010). Water-soluble calixarenes are important in supramolecular chemistry because they allow the study of the host-guest recognition processes under conditions in which most biological processes occur (Arena et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Determination of Tryptophan using ap-Sulfonated Calix [4,6,8]arene Modified Gold Electrode

et al. 2014

View full text Add to dashboard Cite

The ability of p-sulfonated calix[n]arenes (n ¼ 4, 6, 8) to form complexes with tryptophan was studied. The electrochemical properties of these complexes immobilized on gold surfaces were examined by cyclic voltammetry. Parameters affecting the performance of the modified electrodes including the arene concentration, scan rate, applied potential, and pH were optimized. Under the optimal conditions, the method had a linear response to tryptophan between 1 Â 10 À7 M and 1 Â 10 À5 M with a detection limit of 3 Â 10 À8 M. The interaction of the tryptophan-p-sulfonated calix[4]arene complex was more stable than the tryptophanp-sulfonated calix[6]arene and p-sulfonated calix[8]arene complexes. Molecular modeling calculations indicated that electrostatic interactions and structural matching effects were predominant stabilizing factors. The modified electrodes demonstrated good reproducibility and high selectivity, illustrating their effectiveness for analytical measurements.

show abstract

Section: Introductionmentioning

confidence: 99%

Determination of Tryptophan using ap-Sulfonated Calix [4,6,8]arene Modified Gold Electrode

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Magnetic solid phase extraction (MSPE) was that, it is a process depends on using magnetic sorbents for separation of various analytes in different volume of the sample [1] in MSPE procedures. The magnetic absorbent was mixed with sample and the analyte was absorbed by magnetic sorbents.…”

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

“…The definition of magnetic solid phase extraction (MSPE) was that, it is a process depend on using magnetic sorbents for separation of various analytes in different volume of the sample [4],. In MSPE procedures.…”

Section: Introductionmentioning

confidence: 99%

Determination of Safranin T Pigment in Food Samples by Ionic Liquid Coated Magnetic Core/Shell Fe3O4@SiO2 Nanoparticles Coupled with Fluorescence Spectrophotometry

Bakheet¹

2017

AJHC

View full text Add to dashboard Cite

Three hydrophobic ionic liquids (IL) 1-octyl-3-methylimidazole hexafluorophosphate ([OMIM]PF 6) (1-butyl-3methylimidazole hexafluorophosphate ([BMIM]PF6),1-hexyl-3-methyl-imidazole hexafluoro-phosphate ([HMIM]PF6), were coated by Fe 3 O 4 @SiO 2 nanoparticles with core-shell structure to prepare magnetic solid phase extraction agent (Fe 3 O 4 @SiO 2 @IL) and establish a new method of magnetic solid phase extraction (MSPE) coupled with Fluorescence spectrophotometery for separation/analysis of safranin T (ST). The results showed that safranin T was adsorbed rapidly by Fe 3 O 4 @SiO 2 @[OMIM]PF 6 and eluted by ethanol., pre-concentration factor of the proposed method was 20-fold. Under the optimal conditions the linear range, detection limit (DL), correlation coefficient (R) and relative standard deviation (RSD) were found to be 0.30-130.00 µg L-1 , 0.05µg L-1 , 0.9998 and 0.35% (n=3, c=10.00 µg L-1), respectively. The Fe 3 O 4 @SiO 2 NPs can be used repeatedly for 10 times. This proposed method has been successfully applied to the determination of safranin T in food samples.

show abstract

A novel spectrofluorometric method for the determination of methiocarb using an amphiphilic p-sulfonatocalix[4]arene

Cited by 12 publications

References 22 publications

Determination of Tryptophan using ap-Sulfonated Calix [4,6,8]arene Modified Gold Electrode

Determination of Tryptophan using ap-Sulfonated Calix [4,6,8]arene Modified Gold Electrode

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 Safranin T Pigment in Food Samples by Ionic Liquid Coated Magnetic Core/Shell Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> Nanoparticles Coupled with Fluorescence Spectrophotometry

Contact Info

Product

Resources

About

A novel spectrofluorometric method for the determination of methiocarb using an amphiphilic p-sulfonatocalix[4]arene

Cited by 12 publications

References 22 publications

Determination of Tryptophan using ap-Sulfonated Calix [4,6,8]arene Modified Gold Electrode

Determination of Tryptophan using ap-Sulfonated Calix [4,6,8]arene Modified Gold Electrode

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 Safranin T Pigment in Food Samples by Ionic Liquid Coated Magnetic Core/Shell 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 Coupled with Fluorescence Spectrophotometry

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

Determination of Safranin T Pigment in Food Samples by Ionic Liquid Coated Magnetic Core/Shell Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> Nanoparticles Coupled with Fluorescence Spectrophotometry