SENSORS AND ACTUATORS B-CHEMICAL
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2016
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IF 4.758
Guo Chen,Xia Hao,Bang Lin Li,Hong Qun Luo,Nian Bing Li
In this work, a simple and reliable electrochemical method for the determination of cadmium using an antimony film modified sodium montmorillonite (NaMM) doped carbon paste electrode (Sb/NaMM-CPE) was described. Due to the strong cation exchange ability and adsorptive characteristics of NaMM and excellent electroanalytical performance of the antimony film, the new electrode significantly enhanced the sensitivity for detection of Cd(II) and exhibited superior performance in comparison with the bare carbon paste electrode, antimony film modified carbon paste electrode (Sb/CPE), and NaMM modified carbon paste electrode (NaMM-CPE). Some parameters such as the composition of the paste, pH of the measure solution, the Sb(III) concentration, deposition time, and deposition potential that influenced the response of cadmium were investigated and the procedure was optimized for cadmium determination. This electrode, combined with square-wave anodic stripping voltammetry, displayed excellent linear behavior in the examined concentration range of 4.0–150.0 μg L −1 Cd(II) ( R 2 = 0.998) with a detection limit of 0.25 μg L −1 . The Sb/NaMM-CPE was successfully applied to the determination of cadmium ion in tap water sample.
研究领域:
电化学
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分析化学
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环境科学
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DOI
高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 11
·1-9
·
IF 5.833
Xia Yixuan,Ma Yuzhi,Wu Yuntao,Yi Yinhui,Lin Huiyu,Zhu Gangbing
A proof-of-principle concept for free-electrodeposited anodic stripping voltammetry (ASV) sensing of Cu 2+ is proposed by using Ti 3 C 2 T x MXene/carbon black (Ti 3 C 2 T x @CB) nanohybrids as electrode materials. Owing to the high adsorption and reduction capability of Ti 3 C 2 T x towards Cu 2+ , Ti 3 C 2 T x MXene enables Cu 2+ to be immobilized and self-reduced directly to form Cu 0 on the Ti 3 C 2 T x @CB electrode surface. As a result an oxidation peak current appears from the re-oxidation of Cu 0 via differential pulse voltammetry. Carbon black (CB) was introduced to prevent Ti 3 C 2 T x Mxene aggregation and improve the related electron transfer as well as enhance their surface area. After optimizing various conditions, a considerable low limit of detection (4.6 nM) and a wide linear range (0.01–15.0 μM) for Cu 2+ were achieved at the working potential from − 0.3 V to 0.0 V (vs SCE). Relative standard deviation (RSD) of eight individual Ti 3 C 2 T x @CB electrodes is 3.72%, and the recoveries from tap water sample and lake water sample were in the ranges of 97.0–108% and 104–107%, respectively. Graphical abstract
研究领域:
分析化学
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材料科学
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环境监测
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DOI
PubMed
高影响因子
SENSORS
·
2018
·Vol. 18
·期 5
·1503
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IF 2.475
Liuyang Zhang,Jinju Luo,Xinyu Shen,Chunya Li,Xian Wang,Bei Nie,Huaifang Fang
Direct detecting of trace amount Al(III) in aqueous solution by stripping voltammetry is often frustrated by its irreversible reduction, resided at −1.75 V (vs. Ag/AgCl reference), which is in a proximal potential of proton reduction. Here, we described an electroanalytical approach, combined with liquid phase microextraction (LPME) using ionic liquid (IL), to quantitatively assess trace amount aluminum in environmental samples. The Al(III) was caged by 8-hydroxyquinoline, forming a superb hydrophobic metal–chelate, which sequentially transfers and concentrates in the bottom layer of IL-phase during LPME. The preconcentrated Al(III) was further analyzed by a square-wave anodic stripping voltammetry (SW-ASV). The resulting Al-deposited electrodes were characterized by scanning electron microscopy and powder X-ray diffraction, showing the intriguing amorphous nanostructures. The method developed provides a linear calibration ranging from 0.1 to 1.2 ng L−1with a correlation coefficient of 0.9978. The LOD attains as low as 1 pmol L−1, which reaches the lowest report for Al(III) detection using electroanalytical techniques. The applicable methodology was implemented for monitoring Al(III) in commercial distilled water.Keywords:ionic liquid;liquid phase microextraction;anodic stripping voltammetry;aluminum ion
研究领域:
分析化学
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环境科学
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DOI
PubMed
高影响因子
RSC Advances
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2021
·Vol. 11
·期 28
·17240-17248
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IF 3.361
Jinying Hou,Yuping Fan,Xiaomin Ma,Xianshu Dong,Suling Yao
Fly ash, as waste from coal combustion, has been effectively modified to improve its adsorption to remove toxic metals, and modified fly ash could be used for electrode modification to improve the sensitivity of the electrode. In this paper, a modified fly ash doped carbon paste electrode for the detection of trace cadmium was first and successfully developed. Several parameters affecting the anodic stripping voltammetric response of Cd(II) were optimized, such as the composition of the paste, pH of the measurement solution, the concentration of Sb(III) (or Sb(III) and Bi(III)), deposition potential and deposition time. Compared with Sb/MFA-CPE, the square wave anodic stripping voltammetry (SWASV) response of Cd(II) at Sb/MMFA-CPE had a higher linear range and lower sensitivity. Relative to MFA, MMFA-CPE, due to the introduction of CTAB, provided a larger effective area for interacting with analytes, more binding sites and further facilitating electron transfer at the electrode, and amplified the electrochemical signal. Compared with Sb/MMFA-CPE, the SWASV response of Cd(II) at Sb–Bi/MMFA-CPE had a higher linear range and similar sensitivity, since mechanisms at bismuth and antimony film electrodes were different. Besides, the electrode reactions of Cd(II) at bismuth film electrodes involved adsorption phenomena while they were free of adsorption at antimony film electrodes.
研究领域:
环境科学
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分析化学
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2021
·
IF 4.821
Daixiong Zhang,Qing Xiang
In this work, a Sn-Bi film was successfully fabricated via the electrophoretic deposition (EPD) of nano-Sn powders and nano-Bi powders in an ethanol dispersion medium. Study on film composition showed that a coefficient of proportionality between the mass ratio in the deposited film and that in the suspension was observed for the EPD of Sn-Bi, which controlled the composition of the Sn-Bi film. Therefore, Sn-Bi films with different mass ratios were designed with this linear relationship for the codetection of Cd(II) and Pb(II). Square-wave anodic stripping voltammetry (SWASV) measurements using an in-situ plating strategy were performed after the electrochemical oxidation of Sn and Bi at 0.3 V for 120 s, and the results indicated that the Sn-Bi film with a mass ratio of 0.75 had the best determination ability.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2021
·
IF 4.821
Hui Li,Jie Zhao,Shifan Zhao,Guofeng Cui
Developing a reliable, sensitive and portable electrochemical sensor for precise determination of trace heavy metal ions in water is an attractive challenge. In this work, an integrated three-electrode sensor based on screen–printed gold working electrode (SPAuE) ex-situ electroplated bismuth film was developed via a facile and simple process for the determination of trace Pb(II), Cd(II), and Zn(II) by square wave anodic stripping voltammetry (SWASV). The bismuth film was deposited on SPAuE at a potential of −0.08 V (Bi/SPAuE −0.08V ). The results exhibited the sensor with a wide linear range (from 1 to 120 μg L -1 ) for the simultaneous detection of these three heavy metal ions. Besides, the detection limits of Pb(II), Cd(II), and Zn(II) for the sensor were respectively found to be 0.04 μg L −1 , 0.02 μg L −1 , and 0.05 μg L −1 (S/N = 3). The proposed sensor revealed good anti-interference ability, satisfactory repeatability with RSDs of less than 2.5% (n = 12), excellent reproducibility with RSDs of less than 2.5% (n = 6), and considerable stability. The detection accuracy of the Bi/SPAuE −0.08V based sensor was further evaluated via atomic absorption spectroscopy (AAS). Due to its simplicity in process, high detection performance and excellent reliability, such sensors are expected to find utility in portable heavy metal detection applications.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2017
·Vol. 33
·期 5
·799-803
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IF 1.024
Cui Wenyu,Fan Lishuang,Geng Lin,An Maozhong,Zhang Fujun
The use of a digital versatile disc(DVD)-based Ag electrode for the square-wave anodic stripping voltammetric determination of Pb 2+ and Cd 2+ was described. The effect of I – on the stripping analysis of Pb 2+ and Cd 2+ at Ag electrodes was first studied. I – significantly improved the stripping peaks of both Pb 2+ and Cd 2+ . The square-wave voltammetric stripping response was linear over 5―50 μg/L for Pb 2+ and Cd 2+ with a deposition time of 118 s. The detection limits were 0.2 and 2.6 μg/L for Pb 2+ and Cd 2+ , respectively. The high sensitivity, selectivity, and stability of this DVD-based Ag electrode enabled its practical application for simple, rapid and economical determination of trace levels of Cd 2+ and Pb 2+ in tap water samples. In addition, detection can be achieved without sample deoxygenation and the electrode can be easily manufactured.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
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IF 3.84
Huaifang Fang,Jie Zhang,Shu Zhou,Wei Dai,Chunya Li,Dongyun Du,Xinyu Shen
Atomic layers of antimony were electrodeposited onto glassy carbon electrode in overpotential region. The antimony deposition was characterized by chronocoulometry and scanning electron microscopy. Based on the excellent electrochemical properties of the glassy carbon/antimony system, a simple method was developed for rapid and reliable determination of ultra-trace Sb(V) by square-wave anodic stripping voltammetry. The key operational parameters of influencing the electroanalytical response of Sb, such as deposition potential, deposition time, and composition of the measurement solution, were investigated. Under the optimized condition, the method provided a linear calibration ranging from 1 to 16 pg L −1 with a respective correlation coefficient of 0.9906. The detection limit was 1.64 fmol L −1 , which is the lowest ever reported for an electroanalytical technique and one of the lowest analytical methods for Sb(V) determination. The relative standard deviation for a Sb(V) solution (5 pg L −1 ) was 3.2% for eight successive assays. Finally, the method was applied to the determination of antimony in tap water and compared with inductively coupled plasma mass spectrometry technique.
研究领域:
分析化学
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环境科学
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产品关联
DOI
高影响因子
ANALYTICAL LETTERS
·
2022
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IF 2.267
Lan Yang,Leilei Sun,Jie Song,Xueliang Zhao,Xicai Pan,Zeming Wu,Qingyun Cai
The motivation of this work is to develop a simple method for the on-site detection of total arsenic at the ppb level. For this purpose, novel nano-coral gold (NCG) was fabricated using NH4Br to lead the growth of Au along a definite direction on a gold substrate. Square wave anodic stripping voltammetry (SWASV) was used for the determination of arsenic in industrial water with a NCG working electrode. Due to the high specific surface area and nano-structure of the nano-coral gold, high sensitivity was achieved with a limit of detection (LOD) of 0.4 ppb. 3.2 ppb arsenic was determined in industrial water. The detectable arsenic concentration is far below the regulatory limit of 10 ppb by the World Health Organization (WHO). Across the As (III) linear range from 2.5 to 100 ppb, the sensor response is stable, reproducible, and linear with concentration.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
Materials
·
2020
·Vol. 13
·期 22
·5102
·
IF 3.057
Luyi Huang,Yoshikazu Ito,Takeshi Fujita,Xingbo Ge,Ling Zhang,Heping Zeng
Heavy metals pollution is one of the key problems of environment protection. Electrochemical methods, particularly anodic stripping voltammetry, have been proven a powerful tool for rapid detection of heavy metal ions. In the present work, a bismuth modified porous graphene (Bi@PG) electrode as an electrochemical sensor was adopted for the detection of heavy metal Cd2+in an aqueous solution. Combining excellent electronic properties in sensitivity, peak resolution, and high hydrogen over-potential of bi-continuous porous Bi with the large surface-area and high conductivity on PG, the Bi@PG electrode exhibited excellent sensing ability. The square wave anodic stripping voltammetry response showed a perfect liner range of 10−9–10−8M with a correlation coefficient of 0.9969. The limit of detection (LOD) and the limit of quantitation (LOQ) are calculated to be 0.1 and 0.34 nM with a sensitivity of 19.05 μA·nM−1, which is relatively excellent compared to other carbon-based electrodes. Meanwhile, the Bi@PG electrode showed tremendous potential in composite detection of multifold heavy metals (such as Pb2+and Cd2+) and wider linear range.Keywords:porous materials;graphene;bismuth;electrochemical deposition;square wave anodic stripping voltammetry
研究领域:
环境科学
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材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
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2018
·Vol. 185
·期 5
·1-9
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IF 5.705
Han Xiujuan,Meng Zuchao,Zhang Hongfang,Zheng Jianbin
Various carbon nanomaterials for use in anodic stripping voltammetric analysis of Hg(II), Cu(II), Pb(II) and Cd(II) are screened. Graphene, carbon nanotubes, carbon nanofibers and fullerene (C 60 ), dispersed in chitosan (Chit) aqueous solution, are used to modify a glassy carbon electrode (GCE). The fullerene-chitosan modified GCE (C 60 -Chit/GCE) displays superior performance in terms of simultaneous determination of the above ions. The electrodes and materials are characterized by electrochemical impedance spectroscopy, cyclic voltammetry, scanning electron microscopy, Raman spectroscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The excellent performance of C 60 -Chit/GCE is attributed to the good electrical conductivity, large surface area, strong adsorption affinity and unique crystalline structure of C 60 . Using differential pulse anodic stripping voltammetry, the assay has the following features for Hg(II), Cu(II), Pb(II) and Cd(II), respectively: (a) Peak voltages of +0.14, −0.11, −0.58 and − 0.82 V (vs SCE); (b) linear ranges extending from 0.01–6.0 μM, 0.05–6.0 μM, 0.005–6.0 μM and 0.5–9.0 μM; and (c), detection limits (3σ method) of 3 nM (0.6 ppb), 14 nM (0.9 ppb), 1 nM (0.2 ppb) and 21 nM (2.4 ppb). Moreover, the modified GCE is well reproducible and suitable for long-term usage. The method was successfully applied to the simultaneous determination of these ions in spiked foodstuff.
Compared with graphene, carbon nanotubes and carbon nanofibers, an electrode modified with fullerene in chitosan electrode displays superior performance for the simultaneous anodic stripping voltammetric detection of Hg(II), Cu(II), Pb(II) and Cd(II).
研究领域:
分析化学
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环境科学
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食品科学
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Yixuan Xia,Jiating Li,Gangbing Zhu,Yinhui Yi
Anodic stripping voltammetry (ASV) is presently the most widely used method for mercury ion (Hg 2+ ) detection, but it generally needs an electrodeposition step. As a new star nanomaterial , MXenes shows greatly important applications in electrochemical sensing. In this work, by preparing Ti 3 C 2 T x MXenes nanoribbons/carbon nanotube (Ti 3 C 2 T x R/CNT) nanohybrids to modify glassy carbon electrode (GCE) as sensing platform, an innovative strategy without electrodeposition was proposed for the sensitive detection of Hg 2+ . The results show that Ti 3 C 2 T x R exhibits spontaneous adsorption and reduction capability towards Hg 2+ , which can make Hg 2+ self-reduced and preconcentrated on the electrode surface . Coupled with the excellent electronic properties of CNT, an electrodeposition-free and sensitive ASV sensor was constructed, and Ti 3 C 2 T x R/CNT/GCE can exhibit superior sensing performances for Hg 2+ analysis with a low detection of limit (5.2 nM) and wide linearity range (0.01–7.0 μM). This work offered a new direction for MXenes nanomaterials and Hg 2+ detection.
研究领域:
材料科学
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环境科学
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分析化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）