Thiocyanate separation by imprinted polymeric systems

Özkütük, Ebru Birlik; Özalp, Elif; Ersöz, Arzu; Açikkalp, Erol; Say, Rıdvan

doi:10.1007/s00604-010-0319-z

Cited by 8 publications

(2 citation statements)

References 30 publications

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“…And the adsorption capacity ( Q ) was calculated from Eq. []:

Q = \frac{((, C_{o} - (), C_{normale}))}{1000 m} \times V

where Q (mg g −1 ) is the adsorption capacity, V (L) is the volume of the solution, m (mg) is the weight of MWNTs‐MIPs or NIPs, C o (mg L −1 ) and C e (mg L −1 ) are the concentrations of rhein or emodin before and after adsorption, respectively.…”

Section: Methodsmentioning

confidence: 99%

Novel molecularly imprinted polymers based on multiwalled carbon nanotubes with bifunctional monomers for solid‐phase extraction of rhein from the root of kiwi fruit

Chen

Zhang

Yang

et al. 2012

J of Separation Science

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A novel molecularly imprinted polymers based on multiwalled carbon nanotubes synthesized by precipitate polymerization was applied as a selective sorbent for separation and determination of rhein (4,5-dihydroxyanthraquinone-2-carboxylic acid) from the root of kiwi fruit samples coupled with high performance liquid chromatography (HPLC). The molecularly imprinted polymers were prepared with methacrylic acid and 4-vinylpyridine as bifunctional monomers. The chemical structure of the molecularly imprinted polymers was characterized by Fourier transform infrared spectrometer. The equilibrium rebinding experiment and competitive adsorption experiment showed that these imprinted polymers exhibited good adsorption ability toward rhein. The Langmuir adsorption equilibrium constant, K(m) , and theoretical maximum adsorption capacity, Q(m) , were estimated to be 0.43 and 6.77 mg g(-1) , respectively. Compared with molecularly imprinted polymers prepared with methacrylic acid or 4-vinylpyridine solely, the molecularly imprinted polymers synthesized with bifunctional monomers showed enhanced molecular imprinting effect and higher adsorption capacity for the template rhein. The performances of the molecularly imprinted polymers utilized as solid phase extraction sorbent were investigated in detail. The molecularly imprinted polymers prepared by the method proposed in this work could successfully apply to extraction and determination of rhein from the root of kiwi fruit samples coupled with HPLC.

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“…And the adsorption capacity ( Q ) was calculated from Eq. []:

Q = \frac{((, C_{o} - (), C_{normale}))}{1000 m} \times V

Section: Methodsmentioning

confidence: 99%

Novel molecularly imprinted polymers based on multiwalled carbon nanotubes with bifunctional monomers for solid‐phase extraction of rhein from the root of kiwi fruit

Chen

Zhang

Yang

et al. 2012

J of Separation Science

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“…As a main byproduct of CN – metabolism, SCN − is, therefore, an important marker of smoking, along with carbon monoxide, nicotine, and cotinine. Thus, the determination of SCN − in body fluids (urine, serum, and saliva) can provide a useful probe for distinguishing between smokers and non‐smokers [7].…”

Section: Introductionmentioning

confidence: 99%

Microextraction with smartphone detection of thiocyanate in saliva of tobacco smokers using paper‐based analytical method

Hassan

2023

J of Separation Science

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This study presents a novel, cost‐effective approach involving spectrophotometric and smartphone paper‐based (SPB) methods and a distinctive salting‐out air‐assisted dispersive microextraction procedure to quantify thiocyanate in saliva samples. The method relies on the inhibitory effect of thiocyanate on quinoneimine dye formation during the Emerson reaction with sodium hypochlorite. Spectrophotometry quantifies the extracted dye by monitoring quinoneimine color intensity reduction at 525 nm. In the SPB method, extracted dye is applied to a paper strip, a smartphone captures the colored paper, and an application analyzes red, green, and blue components. All analyte determination and extraction variables were explored. Both methods exhibit good linearity (10–100 μg/L) with a coefficient of determination of 0.9991 and a limit of detection of 7.5 μg/L for the spectrophotometric method, and a coefficient of determination of 0.9988 and a limit of detection of 8.8 μg/L for the SPB method. The calculated values for the enrichment factor and extraction recovery of the developed extraction methodology were 46% and 93%, respectively. The methods detect thiocyanate in saliva samples, producing results comparable to a validated method.

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Phosphate‐imprinted polymer as an efficient modifier for the design of ion‐selective electrode

Özkütük

Yıldız

Gündüz

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND In this study, the ion‐selective electrode (ISE) based on ion‐imprinted polymer (IIP) for the determination of phosphate has been described. For selective recognition of IIP, phosphate (analyte–template), chitosan and N‐(2‐aminoethyl)‐3‐aminopropyl‐trimethoxysilan (AAPTS) (functional monomers), ephychlorohydrin and tetraethoxysilicate (TEOS) (cross‐linking agents) were used. RESULTS The electrode was prepared using the IIP. The IIP‐1‐, IIP‐2‐ and IIP‐3‐based membranes showed a detection limit of 7.6 × 10−6, 5.1 × 10−6 and 2.5.10−7 mol L−1, respectively. Attractive features of these IIP‐based ion‐selective electrodes are a rather low detection limit and high selectivity compared with other phosphate molecules. CONCLUSION The proposed method has been applied successfully to analyze phosphate in household waste samples with recoveries of ≥90%. © 2021 Society of Chemical Industry (SCI).

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Thiocyanate separation by imprinted polymeric systems

Cited by 8 publications

References 30 publications

Novel molecularly imprinted polymers based on multiwalled carbon nanotubes with bifunctional monomers for solid‐phase extraction of rhein from the root of kiwi fruit

Novel molecularly imprinted polymers based on multiwalled carbon nanotubes with bifunctional monomers for solid‐phase extraction of rhein from the root of kiwi fruit

Microextraction with smartphone detection of thiocyanate in saliva of tobacco smokers using paper‐based analytical method

Phosphate‐imprinted polymer as an efficient modifier for the design of ion‐selective electrode

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