On-site electrochemical determination of phosphate with high sensitivity and anti-interference ability in turbid coastal waters

Hong, Wei; Pan, Dawei; Zhou, Zhengwen; Han, Haitao; Zhu, Rilong

doi:10.1016/j.ecoenv.2021.112444

Cited by 13 publications

(7 citation statements)

References 42 publications

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“…The relative recoveries varied from 91.0 to 101.0%, and the relative standard deviations (RSD%, n = 3) were 0.99–7.69. It is noteworthy that Cu 2+ was detected in turbid seawater, oilfield-produced wastewater, and domestic wastewater samples with relatively high recoveries, indicating that VMSF- g -CS/GCE can enrich Cu 2+ with excellent performance in removing interfering substances such as salinity and organic substance in real environmental samples . This result confirmed the reliability of the VMSF- g -CS/GCE working in real environments and showed strong potential for food, environmental, and clinical research applications.…”

Section: Resultssupporting

confidence: 59%

“…Thus, an essential prerequisite for the treatment and removal of water pollutants is accurate and in situ sensing of potential HMI pollutants in different environments. Compared with traditional detection methods, electrochemical sensors have gained widespread attention due to their advantages of high sensitivity, fast analysis, and unnecessity for cumbersome devices and additional chromogenic reagents. , Most importantly, electrochemical sensors are unique in that they can be used for both labeled and unlabeled detection, and they are unaffected by the color of the detection matrix and the tiny sample sizes. , However, nonspecific adsorption among multiple complex environments in which actual samples exist is one of the urgent problems to be solved in electrochemical sensing. The accuracy and reproducibility of the electrochemical detection will be affected to some extent .…”

Section: Introductionmentioning

confidence: 99%

“…9,10 Most importantly, electrochemical sensors are unique in that they can be used for both labeled and unlabeled detection, and they are unaffected by the color of the detection matrix and the tiny sample sizes. 11,12 However, nonspecific adsorption among multiple complex environments in which actual samples exist is one of the urgent problems to be solved in electrochemical sensing. The accuracy and reproducibility of the electrochemical detection will be affected to some extent.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Long-Term Antifouling Ability and Enrichment Effect of a Vertically Ordered Mesoporous Silica Film via Covalent Linkage of Chondroitin Sulfate for In Situ Detection of Cu²⁺ in Real Environmental Samples

Wang

Zhang

et al. 2023

ACS EST Water

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The design and construction of antifouling sensing interfaces have been widely concerned due to the matrix effect of the complex environment and nonspecific adsorption at the electrode interface. However, it is challenging to ensure the long-term stability of an antifouling sensing interface during real sample detection. Herein, an interface construction strategy based on covalent bonds is proposed for striking enhancement of the long-term antifouling ability of a sensing interface based on a vertically ordered mesoporous silica film (VMSF) and a biobased antifouling materialchondroitin sulfate (CS). The covalent linkage of VMSF with CS (named VMSF-g-CS/GCE) could strengthen the long-term hydrophilicity and biocompatibility of VMSF/GCE. As expected, the VMSF-g-CS/GCE exhibited excellent long-term antifouling performances, which is a promising candidate sensing platform to be applied to long-term monitoring. Alternatively, the VMSF-g-CS/GCE exhibits a better enrichment effect to Cu2+ than VMSF/GCE and VMSF-CS/GCE (without covalent bonds). Therefore, VMSF-g-CS/GCE exhibited a current response toward Cu2+ within the scope of 0.1–0.8 μM, with a limit of detection (LOD) of 20.58 nM. The proposed design strategy offers an idea for the precise regulation of antifouling sensing surfaces, and the resulting high-performance sensing platform is attractive for in situ detection of Cu2+.

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Section: Resultssupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced Long-Term Antifouling Ability and Enrichment Effect of a Vertically Ordered Mesoporous Silica Film via Covalent Linkage of Chondroitin Sulfate for In Situ Detection of Cu²⁺ in Real Environmental Samples

Wang

Zhang

et al. 2023

ACS EST Water

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“…al. (23) developed a modified screen printing electrode for DPV analysis of PO4 3in turbid coastal waters, with a linear detection range of 0.2 to 150 µM and a LOD of 0.05 µM.…”

Section: Introductionmentioning

confidence: 99%

NaOH Pretreated Molybdate-Carbon Paste Electrode for the Determination of Phosphate in Seawater by Square Wave Voltammetry with Impedimetric Evaluation

Altahan¹,

Achterberg²,

Galal³

et al. 2021

J. Electrochem. Soc.

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Here we describe a new electrochemical sensor for PO4 3− detection in seawater. In this work, we prepared a carbon paste electrode (CPE) modified with molybdate and pretreated in 0.1 M NaOH using cyclic voltammetry (CV). The modified CPE was employed for the determination of PO4 3− in artificial seawater (35 g/L NaCl) acidified with sulfuric acid to pH 0.8. An additional cleaning step (cyclic voltammetry (CV)) of 10 cycles in 0.1 M NaOH at −0.5 to 0.5 V was required between PO4 3− determinations to dissolve the phosphomolybdic complex formed on the surface of the working electrode. Electrochemical impedance spectroscopy (EIS) results confirmed that the molybdate-modified CPE (molybdate/CPE) exhibited a low charge-transfer resistance (Rct) toward PO4 3−, and showed an improved analytical performance for different concentrations of PO4 3−. A calibration plot in the range of 0.01–5 µM with a limit of detection (LOD) of 0.003 µM was obtained. The proposed electrode demonstrated good precision (4.3% and 5.8%) for concentrations of 5 and 0.2 µM, respectively. The proposed method was employed to analyze PO4 3− in seawater samples on a research cruise in the North Sea, with results in close agreement to those obtained using conventional colorimetric measuremen

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“…Up to now, many analytic approaches have been developed for the detection of Pi, including the fluorescence method [2][3][4][5], chromatography [6,7], and electrochemical method [8][9][10][11]. However, these methods require precious instruments, which are not practical for on-site and large-scale analysis.…”

Section: Introductionmentioning

confidence: 99%

Cobalt-Based Metal-Organic Framework Nanoparticles with Peroxidase-like Catalytic Activity for Sensitive Colorimetric Detection of Phosphate

et al. 2022

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Appropriate addition of phosphate salt in food can improve the food quality and taste. However, extensive intake of phosphate salt may lead to some human diseases such as hyperphosphatemia and renal insufficiency. Thus, it is essential to establish a cost-effective, convenient, sensitive, and selective method for monitoring phosphate ion (Pi) to ensure food quality control. In this work, a Co-based metal-organic frameworks (Co-MOF) nanomaterial with dual functions (peroxidase-like activity and specific recognition) was designed for acting as a catalytic chromogenic platform for sensitive detection of Pi. The Co2+ nodes not only provide high enzyme-like activity to catalyze the 3,3′,5,5′--tetramethylbenzidine (TMB) substrate to blue oxTMB (652 nm) but also act as selective sites for Pi recognition. The use of cationic organic ligands (2-methylimidazole) and cationic metal ions (Co2+) endows the Co-MOF with a strong positive surface charge, which is beneficial to the capture of negative-charged Pi and the dramatically suppressed TMB oxidation. When Pi exists, it specifically adsorbs onto the Co-MOF through the Co-O-P bond and the strong electrostatic interaction, leading to the change of surface charge on Co-MOF. The peroxidase-like catalytic activity of Co-MOF is thus restrained, causing a different catalytic effect on TMB oxidation from that without Pi. Based on this principle, a colorimetric assay was established for rapid and sensitive detection of Pi. A good linear relationship was obtained between Pi concentration and the absorbance at 652 nm, with a linear range of 0.009–0.144 mg/L and a detection limit of 5.4 μg/L. The proposed assay was applied to the determination of Pi in actual food samples with recoveries of 92.2–108% and relative standard deviations (RSDs) of 2.7–7.3%, illustrating the promising practicality for actual samples analysis.

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On-site electrochemical determination of phosphate with high sensitivity and anti-interference ability in turbid coastal waters

Cited by 13 publications

References 42 publications

Enhanced Long-Term Antifouling Ability and Enrichment Effect of a Vertically Ordered Mesoporous Silica Film via Covalent Linkage of Chondroitin Sulfate for In Situ Detection of Cu²⁺ in Real Environmental Samples

Enhanced Long-Term Antifouling Ability and Enrichment Effect of a Vertically Ordered Mesoporous Silica Film via Covalent Linkage of Chondroitin Sulfate for In Situ Detection of Cu²⁺ in Real Environmental Samples

NaOH Pretreated Molybdate-Carbon Paste Electrode for the Determination of Phosphate in Seawater by Square Wave Voltammetry with Impedimetric Evaluation

Cobalt-Based Metal-Organic Framework Nanoparticles with Peroxidase-like Catalytic Activity for Sensitive Colorimetric Detection of Phosphate

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On-site electrochemical determination of phosphate with high sensitivity and anti-interference ability in turbid coastal waters

Cited by 13 publications

References 42 publications

Enhanced Long-Term Antifouling Ability and Enrichment Effect of a Vertically Ordered Mesoporous Silica Film via Covalent Linkage of Chondroitin Sulfate for In Situ Detection of Cu2+ in Real Environmental Samples

Enhanced Long-Term Antifouling Ability and Enrichment Effect of a Vertically Ordered Mesoporous Silica Film via Covalent Linkage of Chondroitin Sulfate for In Situ Detection of Cu2+ in Real Environmental Samples

NaOH Pretreated Molybdate-Carbon Paste Electrode for the Determination of Phosphate in Seawater by Square Wave Voltammetry with Impedimetric Evaluation

Cobalt-Based Metal-Organic Framework Nanoparticles with Peroxidase-like Catalytic Activity for Sensitive Colorimetric Detection of Phosphate

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Product

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Enhanced Long-Term Antifouling Ability and Enrichment Effect of a Vertically Ordered Mesoporous Silica Film via Covalent Linkage of Chondroitin Sulfate for In Situ Detection of Cu²⁺ in Real Environmental Samples

Enhanced Long-Term Antifouling Ability and Enrichment Effect of a Vertically Ordered Mesoporous Silica Film via Covalent Linkage of Chondroitin Sulfate for In Situ Detection of Cu²⁺ in Real Environmental Samples