Molecularly imprinted nanoparticles based potentiometric sensor with a nanomolar detection limit

Liang, Rongning; Kou, Lijuan; Chen, Zhaopeng; Qin, Wei

doi:10.1016/j.snb.2013.07.110

Cited by 37 publications

(26 citation statements)

References 41 publications

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“…Lead ionophore IV was used as the ionophore for selective recognition of chloro-mercury complexes. By employing the asymmetric membrane based ISE configuration previously reported by our group [25,26], potentiometric detection of trace-level mercury in Cl − -rich samples can be achieved.…”

Section: Resultsmentioning

confidence: 99%

“…Potentiometric detection of mercury is performed in the presence of 0.05 M NaCl background which ensures the anionic forms of mercury species. To improve the detection sensitivity of the potentiometric sensor, the asymmetric membrane rotating ISE configuration based on the nonequilibrium steady-state diffusion process of primary ions at the sample-membrane interface is used [25,26]. By choosing HgCl 3 − as a model, the proposed method shows a low detection limit of 4.5 × 10 −10 mol/L in the presence of 0.05 M NaCl.…”

Section: Introductionmentioning

confidence: 99%

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Highly sensitive potentiometric sensor for detection of mercury in Cl−-rich samples

Liang

Wang

Qin

2015

Sensors and Actuators B: Chemical

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a b s t r a c tPotentiometric sensors have been exploited for the determination of Hg 2+ ions. However, applications of such sensors are limited to mercury detection in the absence of a Cl − -rich background since Hg 2+ can readily form coordination complexes with Cl − . This paper describes a potentiometric sensor for the determination of anionic mercury species using tert-butylcalix[4]arene-tetrakis(N,N-dimethylthioacetamide) as anion-selective ionophore and tridodecylmethylammonium chloride as ion exchanger. An asymmetric membrane rotating ion-selective electrode configuration is used to improve the detection sensitivity. By using HgCl 3 − as a model of anionic mercury species, the proposed method allows potentiometric detection of mercury down to nanomolar levels in samples containing 0.05 M NaCl background electrolyte. The practical application of the proposed sensor has been performed for the determination of total mercury concentrations in diluted seawater samples.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Highly sensitive potentiometric sensor for detection of mercury in Cl−-rich samples

Liang

Wang

Qin

2015

Sensors and Actuators B: Chemical

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“…For example, Liang, et al [34], prepared a MIP for the analysis of triclosan in toothpaste samples using triclosan as template. Regarding the risks of template leakage during applications, no information was found in the analysed reports with concern to the extent of the extraction.…”

Section: Templatementioning

confidence: 99%

“…Other cross-linkers like DVB and TRIM have been used in mixture to produce imprinted nanobeads for the analysis of triclosan [34]. The authors demonstrated that the use of these two cross-linkers allowed a precise control of imprinted particles size.…”

Section: Cross-linkermentioning

confidence: 99%

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Applications of molecularly imprinted polymers to the analysis and removal of personal care products: A review

Figueiredo

Erny

Santos

et al. 2016

Talanta

145

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Personal-care products (PCPs) involve a variety of chemicals whose persistency along with their constant release into the environment raised concern to their potential impact on wildlife and humans health. Regarded as emergent contaminants, PCPs demonstrated estrogenic activity leading to the need of new methodologies to detect and remove those compounds from the environment.Molecular imprinting starts with a complex between a template molecule and a functional monomer, which is then polymerized in the presence of a cross-linker. After template removal, the polymer will contain specific cavities. Based on a good selectivity towards the template, molecularly imprinted polymers (MIPs) have been investigated as efficient materials for the analysis and extraction of the so called emergent pollutants contaminants.Rather than lowering the limit of detections, the key theoretical advantage of MIP over existing methodologies is the potential to target specific chemicals. This unique feature, sometime named specificity (as synonym to very high selectivity) allows to use cheap, simple and/or rapid quantitative techniques such as fast separation with ultra-violet (UV) detection, sensors or even spectrometric techniques. When a high degree of selectivity is achieved samples extracted with MIPs can be directly analysed without the need of a separation step. However, while some papers clearly demonstrated the specificity of their MIP toward the targeted PCP, such prove is often lacking, especially with real matrices, making it difficult to assess the success of the different approaches.This review paper focusses on the latest development of MIPs for the analysis of personal care products in the environment, with particular emphasis on design, preparation and practical applications of MIPs.3

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Fabrication of the Enzyme‐less Voltammetric Bilirubin Sensor Based on Sol‐gel Imprinted Polymer

2019

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Measuring the serum bilirubin (BR) level is part of the common test for newborns, since high concentrations of bilirubin in the blood can cause brain damage and even death for them. Therefore, achieving a fast, accurate and cost effective method for bilirubin assay in medical diagnosis and Medical management of patients with jaundice, especially neonates, is very important. In this study, an electrochemical sensor was developed to detect low amounts of bilirubin in serum samples. The basis of the work is the BR imprinted polymer synthesis and the use of this polymer as a recognition element in the production of the bilirubin voltammetric sensor. For this purpose, bilirubin imprinted polymer was synthesized using the simple sol gel method and the prepared polymer is characterized by SEM and FT‐IR. In the next step, this polymer was applied to modify the carbon paste electrode and provide a sensitive and selective sensor for the BR molecule. The proposed sensor was able to measure the bilirubin in the concentration range of 1 to 100 μM after optimizing the operating conditions. The limit of detection (LOD) and limit of quantification (LOQ) was calculated 0.75 μM and 2.5 μM respectively. It is also applicable to bilirubin assay in serum samples.

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Molecularly imprinted nanoparticles based potentiometric sensor with a nanomolar detection limit

Cited by 37 publications

References 41 publications

Highly sensitive potentiometric sensor for detection of mercury in Cl−-rich samples

Highly sensitive potentiometric sensor for detection of mercury in Cl−-rich samples

Applications of molecularly imprinted polymers to the analysis and removal of personal care products: A review

Fabrication of the Enzyme‐less Voltammetric Bilirubin Sensor Based on Sol‐gel Imprinted Polymer

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