Determination of sulfamethoxazole in foods based on CeO2/chitosan nanocomposite-modified electrodes

Cai, Meizhi; Zhu, Lei; Ding, Yaping; Wang, Junxia; Li, Jianshuang; Du, Xiaodong

doi:10.1016/j.msec.2012.08.017

Cited by 42 publications

(17 citation statements)

References 23 publications

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“…However, CeO 2 nanoparticles are less often used in comparison with other metal oxides. CeO 2 ‐nanostructured‐modified electrodes have been described for the determination of bioactive organic compound in particular uric acid and its mixture with ascorbic acid , sulfamethoxazole , simultaneous determination of L‐tyrosine and epinephrine . Taking into account the poor electroconductivity of the CeO 2 ‐based electrodes limiting their applications, the combination of CeO 2 particles with other conductive materials (other metal nanoparticles , , polymers , , carbon nanomaterials ) is usually used.…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Amperometric Sensor for Eugenol Quantification Based on CeO₂ Nanoparticles and Surfactants

et al. 2017

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Amperometric sensor for eugenol based on glassy carbon electrode (GCE) modified with CeO2 nanoparticles dispersed in surfactant was fabricated. The effect of surfactant nature (sodium dodecylsulfate, cetylpyridinium bromide (CPB) and Brij® 35) on eugenol voltammetric behaviour was tested. In comparison to CeO2‐H2O/GCE, CeO2‐CPB/GCE showed 2.8‐fold increased current and 70 mV cathodic shift of potential in the diffusion‐controlled irreversible electrooxidation. The electrodes were characterized with SEM and EIS. CeO2‐CPB/GCE showed significantly lower charge transfer resistance (2.6±0.3 kΩ vs. 20±1 kΩ for CeO2‐H2O/GCE and 173±9 kΩ for GCE). Under conditions of DPV, the sensor linear dynamic range is 0.075‐75.0 μM of eugenol with the limits of detection (LOD) and quantification (LOQ) of 19.1 and 63.8 nM, respectively. The sensor exhibited high sensitivity, selectivity, good reproducibility and fast response and was applied for the real samples analysis (essential oils and clove spices). The results obtained correspond well to the data of spectrophotometric method.

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Section: Introductionmentioning

confidence: 99%

Highly Sensitive Amperometric Sensor for Eugenol Quantification Based on CeO₂ Nanoparticles and Surfactants

et al. 2017

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“…As shown in Figure 3 A, a pair of well-defined redox peaks could be discovered in all CV plots. The current responses of CHIT/GCE ( Figure 3 Ab 50.7 µA) increased markedly compared to those of GCE ( Figure 3 Aa 36.0 µA), contributing to the cationic amino groups on CHIT combined with negative charged ferricyanide ions through electrostatic interaction [ 41 ]. The peak current at CeO 2 /GCE ( Figure 3 Ac 56.8 µA) showed that the synthesized CeO 2 nanorods had an excellent electronic conductivity.…”

Section: Resultsmentioning

confidence: 99%

Ultrasensitive Electrochemical Detection of Clostridium perfringens DNA Based Morphology-Dependent DNA Adsorption Properties of CeO2 Nanorods in Dairy Products

Qian

et al. 2018

Sensors

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Foodborne pathogens such as Clostridium perfringens can cause diverse illnesses and seriously threaten to human health, yet far less attention has been given to detecting these pathogenic bacteria. Herein, two morphologies of nanoceria were synthesized via adjusting the concentration of NaOH, and CeO2 nanorod has been utilized as sensing material to achieve sensitive and selective detection of C. perfringens DNA sequence due to its strong adsorption ability towards DNA compared to nanoparticle. The DNA probe was tightly immobilized on CeO2/chitosan modified electrode surface via metal coordination, and the DNA surface density was 2.51 × 10−10 mol/cm2. Under optimal experimental conditions, the electrochemical impedance biosensor displays favorable selectivity toward target DNA in comparison with base-mismatched and non-complementary DNA. The dynamic linear range of the proposed biosensor for detecting oligonucleotide sequence of Clostridium perfringens was from 1.0 × 10−14 to 1.0 × 10−7 mol/L. The detection limit was 7.06 × 10−15 mol/L. In comparison, differential pulse voltammetry (DPV) method quantified the target DNA with a detection limit of 1.95 × 10−15 mol/L. Moreover, the DNA biosensor could detect C. perfringens extracted DNA in dairy products and provided a potential application in food quality control.

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“…POLI such as chitosan, alginic acid, pectin, exudate gum, heparin, fucoidan, carrageenan, and porphyran have been applied and stand out as modifying agents for electrochemical devices/sensors . In this context, carbon paste electrodes (CPEs) are devices that have been widely studied due to their properties such as easy surface renewal, low background currents, and low cost.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Spectroscopic Characterization of an Unusual Succinylated Starch Applied to Carbon Paste Electrodes

et al. 2020

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This work presents the structural characterization of an unusual modified starch with succinic anhydride (2% w/v). The product characterized by infrared spectroscopy shows the carbonyl group band in 1724 cm−1, while the 13C NMR spectrum shows two signals in 174.71 and 31.61 ppm associated with the carbonyl and methylenic carbons from the symmetric succinyl group (OCOCH2CH2OCO). These analyses indicate a cross‐linked structure for the modified starch (CL starch). This product is used as a chemical modifier in carbon paste electrodes (CPE). Cyclic voltammetry and electrochemical impedance spectroscopy analyses show that the cross‐linked starch improves the electrochemical performance of the electrodes, since higher peak currents, lower charge transfer resistance values. Also, the increase in the CL starch proportion in CPE results in a higher current intensity for all proportions tested. This behavior can be attributed to decrease in hydrophilic character of the electrode material after the CL addition, which results in a lower capacitive behavior and a higher faradaic current. Among all the modified CPE, the one with 5% w/w CL per graphite proportion shows the best electrochemical features, suggesting its potential application as an electrochemical sensor for the detection of different chemical species of environmental and biological relevance.

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Determination of sulfamethoxazole in foods based on CeO2/chitosan nanocomposite-modified electrodes

Cited by 42 publications

References 23 publications

Highly Sensitive Amperometric Sensor for Eugenol Quantification Based on CeO₂ Nanoparticles and Surfactants

Highly Sensitive Amperometric Sensor for Eugenol Quantification Based on CeO₂ Nanoparticles and Surfactants

Ultrasensitive Electrochemical Detection of Clostridium perfringens DNA Based Morphology-Dependent DNA Adsorption Properties of CeO2 Nanorods in Dairy Products

Synthesis and Spectroscopic Characterization of an Unusual Succinylated Starch Applied to Carbon Paste Electrodes

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Determination of sulfamethoxazole in foods based on CeO2/chitosan nanocomposite-modified electrodes

Cited by 42 publications

References 23 publications

Highly Sensitive Amperometric Sensor for Eugenol Quantification Based on CeO2 Nanoparticles and Surfactants

Highly Sensitive Amperometric Sensor for Eugenol Quantification Based on CeO2 Nanoparticles and Surfactants

Ultrasensitive Electrochemical Detection of Clostridium perfringens DNA Based Morphology-Dependent DNA Adsorption Properties of CeO2 Nanorods in Dairy Products

Synthesis and Spectroscopic Characterization of an Unusual Succinylated Starch Applied to Carbon Paste Electrodes

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Highly Sensitive Amperometric Sensor for Eugenol Quantification Based on CeO₂ Nanoparticles and Surfactants

Highly Sensitive Amperometric Sensor for Eugenol Quantification Based on CeO₂ Nanoparticles and Surfactants