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Liu X, Cui E, Wang M, Zhu Y, Li H, Guo C. Heavy atom-induced quenching of fluorescent organosilicon nanoparticles for iodide sensing and total antioxidant capacity assessment. Anal Bioanal Chem 2024; 416:4409-4415. [PMID: 38864917 DOI: 10.1007/s00216-024-05377-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 05/29/2024] [Accepted: 05/29/2024] [Indexed: 06/13/2024]
Abstract
We present a novel approach for iodide sensing based on the heavy-atom effect to quench the green fluorescent emission of organosilicon nanoparticles (OSiNPs). The fluorescence of OSiNPs was significantly quenched (up to 97.4% quenching efficiency) in the presence of iodide ions (I-) through oxidation by hydrogen peroxide. Therefore, OSiNPs can serve as a fluorescent probe to detect I- with high selectivity and sensitivity. The highly selective response is attributed to the hydrophilic surface enabling good dispersion in aqueous solutions and the lipophilic core allowing the generated liposoluble I2 to approach and quench the fluorescence of OSiNPs. The linear working range for I- was from 0 to 50 μM, with a detection limit of 0.1 μM. We successfully applied this nanosensor to determine iodine content in edible salt. Furthermore, the fluorescent OSiNPs can be utilized for the determination of total antioxidant capacity (TAC). Antioxidants reduce I2 to I-, and the extent of quenching by the remaining I2 on the OSiNPs indicates the TAC level. The responses to ascorbic acid, pyrogallic acid, and glutathione were investigated, and the detection limit for ascorbic acid was as low as 0.03 μM. It was applied to the determination of TAC in ascorbic acid tablets and fruit juices, indicating the potential application of the OSiNP-based I2 sensing technique in the field of food analysis.
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Affiliation(s)
- Xuan Liu
- School of Pharmacy, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China
| | - Enna Cui
- School of Pharmacy, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China
| | - Mengxiao Wang
- School of Pharmacy, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China
| | - Yujie Zhu
- School of Pharmacy, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China
| | - Hongliang Li
- State Key Laboratory of Toxicology and Medical Countermeasures, and Laboratory of Toxicant Analysis, Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Beijing, 100850, China.
| | - Chao Guo
- School of Pharmacy, Xuzhou Medical University, Xuzhou, 221004, Jiangsu, China.
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2
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Tang Y, Gou W, Lv X, Zhou X, Hao J, Sun C, Sun T, Hu L, Yan Z. Convenient colorimetric-fluorescent dual-mode recognition of I - in agricultural products and visual determination of Hg 2+ in drinking beverages using Ag-Pt bimetal quantum dot nanozyme. Food Chem 2023; 408:135259. [PMID: 36566540 DOI: 10.1016/j.foodchem.2022.135259] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 12/13/2022] [Accepted: 12/18/2022] [Indexed: 12/24/2022]
Abstract
Conveniently and efficiently monitoring I- and Hg2+ in agricultural products or drinking beverages for the protection of human health is currently a great challenge. With this aim, a Ag-Pt bimetal quantum-dot nanozyme boosted by bioactive folic acid (FA@Ag-Pt QDs) was first developed for multichannel monitoring of I- and Hg2+ in this work using a two-step liquid-phase reduction method. Not only did the present FA@Ag-Pt QDs possess superior peroxidase-like activity with Michaelis constant (Km) and maximal reaction rate (Vmax) of 0.01 mM/2.95 × 10-8 M·s-1 and 1.15 mM/3.88 × 10-8 M·s-1, respectively, trace Hg2+ or I- could exclusively alter their enzyme-mimic performance with obvious color changes from blue to colorless or dark blue. I- could also strengthen the inherent fluorescence property of FA@Ag-Pt QDs. When applied for visual monitoring of I- and Hg2+ in real beverages or iodine-containing agricultural products, the detection recoveries were 93.9 %-105.3 % and 96.8-104.3 % with low detection limits of 6.56 × 10-8 mol/L and 4.00 × 10-10 mol/L (S/N = 3), respectively. The recovery and detection limit for fluorescent detection of I- were 95.8 %-104.1 % and 1.75 × 10-8 mol/L (S/N = 3), respectively. The mechanisms driving the improved peroxidase-like activity of FA@Ag-Pt QDs and their selective monitoring of Hg2+ and I- were illustrated in detail. The proposed FA@Ag-Pt QDs will act as an efficient sensor for the practical multichannel monitoring of Hg2+ and I-, with superior catalytic signal amplification.
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Affiliation(s)
- Yulian Tang
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China
| | - Wenxin Gou
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China
| | - Xue Lv
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China
| | - Xuemei Zhou
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China
| | - Junkai Hao
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China
| | - Chengjie Sun
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China
| | - Tao Sun
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China
| | - Lei Hu
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China.
| | - Zhengquan Yan
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China.
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Jamilan MA, Abdullah J, Alang Ahmad SA, Md Noh MF. Enhanced electrochemical detection of iodide at a reduced graphene oxide-modified carbon electrode in iodized salts. Food Chem 2022; 393:133382. [PMID: 35667176 DOI: 10.1016/j.foodchem.2022.133382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 05/29/2022] [Accepted: 05/31/2022] [Indexed: 11/19/2022]
Abstract
In this study, enhancement of electrochemical performance of electrochemically reduced graphene oxide (ERGO) on a screen-printed carbon electrode (SPCE) (ERGO/SPCE) coupled with ion-pairing (cetyltrimethylammonium bromide, CTAB) for the determination of iodide in table salt has been described. The electrode modification of ERGO/SPCE was conducted using cyclic voltammetric (CV) scanning in the potential range of 1.3-0.4 V for 50 cycles after the drop-casting of graphene oxide (GO) suspension on the SPCE. It was found that the electro-active surface area of ERGO/SPCE was increased by 1.5-fold compared to the bare SPCE. ERGO/SPCE sensor displays linearity towards iodide in the concentration range from 0.020 to 1.0 mg/L (sensitivity = 5.40 µA(mg/L)-1, R2 = 0.9906) with the limit of detection (LOD) and limit of quantitation (LOQ) of 0.070 mg/L and 0.21 mg/L, respectively. The comparison between polarography and ERGO/SPCE sensor was in good agreement.
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Affiliation(s)
- Mohd Azerulazree Jamilan
- Nutrition, Metabolism and Cardiovascular Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health Malaysia, No. 1, Jalan Setia Murni U13/52, Setia Alam, 40170 Shah Alam, Selangor D.E., Malaysia; Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor D.E., Malaysia
| | - Jaafar Abdullah
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor D.E., Malaysia; Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor D.E., Malaysia.
| | - Shahrul Ainliah Alang Ahmad
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor D.E., Malaysia; Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor D.E., Malaysia
| | - Mohd Fairulnizal Md Noh
- Nutrition, Metabolism and Cardiovascular Research Centre, Institute for Medical Research, National Institutes of Health, Ministry of Health Malaysia, No. 1, Jalan Setia Murni U13/52, Setia Alam, 40170 Shah Alam, Selangor D.E., Malaysia
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4
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Deghadi RG, Eliwa AS, Ali AE, Hosny WM, Mohamed GG. Preparation, Characterization of Novel Cadmium-Based Metal-Organic Framework for Using as a Highly Selective and Sensitive Modified Carbon Paste Electrode in Determination of Cu(II) Ion. COMMENT INORG CHEM 2021. [DOI: 10.1080/02603594.2020.1870963] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Reem G. Deghadi
- Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt
| | - Ayman S. Eliwa
- Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt
| | - Aya E. Ali
- Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt
| | - Wafaa M. Hosny
- Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt
| | - Gehad G. Mohamed
- Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt
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Caleb J, Alshana U, Ertaş N. Smartphone digital image colorimetry combined with solidification of floating organic drop-dispersive liquid-liquid microextraction for the determination of iodate in table salt. Food Chem 2020; 336:127708. [PMID: 32768908 DOI: 10.1016/j.foodchem.2020.127708] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 05/27/2020] [Accepted: 07/28/2020] [Indexed: 02/06/2023]
Abstract
Smartphone digital image colorimetry (SDIC), combined with solidification of floating organic drop-dispersive liquid-liquid microextraction (SFOD-DLLME), was proposed for the determination of iodate ions. A colorimetric box was designed to capture images of sample solutions. Factors affecting the efficiency of SDIC included type of phone, region of interest, position of camera, and distance between camera and sample solution. Optimum SFOD-DLLME conditions were achieved with 1-undecanol (500 µL) as the extraction solvent, ethanol (1.5 mL) as the disperser solvent within 20 s extraction time. Limit of detection (LOD) was found as 0.1 µM (0.2 µg g-1) and enrichment factors ranged between 17.4 and 25.0. Calibration graphs showed good linearity with coefficients of determination higher than 0.9954 and relative standard deviations lower than 5.6%. The proposed method was efficiently applied to determine iodate in table salt samples with percentage relative recoveries ranging between 89.3 and 109.3%.
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Affiliation(s)
- Jude Caleb
- Department of Analytical Chemistry, Faculty of Pharmacy, Near East University, 99138 Nicosia, TRNC, Mersin 10, Turkey.
| | - Usama Alshana
- Department of Analytical Chemistry, Faculty of Pharmacy, Near East University, 99138 Nicosia, TRNC, Mersin 10, Turkey.
| | - Nusret Ertaş
- Department of Analytical Chemistry, Faculty of Pharmacy, Gazi University, 06330 Ankara, Turkey.
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Gupta M, Dsouza A. Salting-out homogeneous liquid-liquid microextraction for the spectrophotometric determination of iodate in food grade salt. J Food Compost Anal 2020. [DOI: 10.1016/j.jfca.2019.103396] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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7
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Zayed MA, Mahmoud WH, Abbas AA, Ali AE, Mohamed GG. A highly sensitive, selective and renewable carbon paste electrode based on a unique acyclic diamide ionophore for the potentiometric determination of lead ions in polluted water samples. RSC Adv 2020; 10:17552-17560. [PMID: 35515636 PMCID: PMC9053576 DOI: 10.1039/d0ra01435d] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 04/20/2020] [Indexed: 11/22/2022] Open
Abstract
Due to the toxicity of lead(ii) to all living organisms as it destroys the central nervous system leading to circulatory system and brain disorders, the development of effective and selective lead(ii) ionophores for its detection is very important. In this work, 1,3-bis[2-(N-morpholino)acetamidophenoxy]propane (BMAPP), belonging to acyclic diamides, was applied as a highly selective lead(ii) ionophore in a carbon paste ion selective electrode for the accurate and precise determination of Pb(ii) ions even in the presence of other interfering ions. Factors affecting the electrode's response behavior were studied and optimized. Scanning electron microscopy (SEM), energy dispersive X-ray (EDX) and FT-IR spectroscopy were used for studying the morphology and response mechanism of the prepared sensor. The lipophilicity of the used ionophore, which contributes to the mechanical stability of the sensor, was studied using the contact angle measurement technique. The selectivity coefficients obtained by the separate solution method (SSM) and fixed interference method (FIM) confirmed the selectivity of the proposed sensor for Pb(ii) ions. The proposed sensor exhibited a Nernstian slope of 29.96 ± 0.34 mV per decade over a wide linear range of 5 × 10−8 to 1 × 10−1 mol L−1 and detection limit of 3 × 10−8 mol L−1 for 2 months with a fast response time (<10 s) and working pH range (2.5–5.5). To further ensure the practical applicability of the sensor, it was successfully applied for the lead(ii) ion determination in different water samples and the obtained data showed an agreement with those obtained by atomic absorption spectroscopy. In addition, it was successfully applied for the potentiometric titration of Pb(ii) against K2CrO4 and Na2SO4. Due to the toxicity of lead(ii) to all living organisms destroying the central nervous system and leading to circulatory system and brain disorders, the development of effective and selective lead(ii) ionophores for its detection is very important.![]()
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Affiliation(s)
- M. A. Zayed
- Chemistry Department
- Faculty of Science
- Cairo University
- Giza
- Egypt
| | | | - Ashraf A. Abbas
- Chemistry Department
- Faculty of Science
- Cairo University
- Giza
- Egypt
| | - Aya E. Ali
- Chemistry Department
- Faculty of Science
- Cairo University
- Giza
- Egypt
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Voltammetric determination of iodide in iodized table salt using cetyltrimethylammonium bromide as ion-pairing. Journal of Food Science and Technology 2019; 56:3846-3853. [PMID: 31413410 DOI: 10.1007/s13197-019-03855-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 05/23/2019] [Accepted: 05/26/2019] [Indexed: 10/26/2022]
Abstract
In this work, voltammetric study based on cetyltrimethylammonium bromide (CTAB) as an ion-pairing agent for the determination of iodine level in iodized table salt has been explored. CTAB was used as an intermediate compound between iodide (I-) and the electrode due to its ability to dissociate to produce cetyltrimethylammonium ions ([CTA]+). The [CTA]+ with a long hydrophobic alkyl chain can be directly adsorbed onto the surface of the working electrode, and this in turns coated the electrode with cationic charge and enhance the electrode ability to bind to iodide (I-) and other molecular iodine ions. A mixture of iodide and CTAB ([CTA]+I-) was prepared and potential of 1.0 V for 60.0 s was applied to pre-concentrate the solution on the working electrode causing the [CTA]+I- to oxidize to iodine (I2). The produced I2 immediately react with chloride ion (Cl-) from the electrolyte of hydrochloric acid (HCl) to produce I2Cl- and form ion-pair with CTA+ as [CTA]+I2Cl-. The linear calibration curve of the developed method towards iodide was in the concentration range of 0.5-4.0 mg/L with sensitivity of - 1.383 µA mg/L-1 cm-2 (R2 = 0.9950), limit of detection (LOD) of 0.3 mg/L and limit of quantification (LOQ) of 1.0 mg/L, respectively. The proposed method indicates good agreement with the standard method for iodine determination with recovery range from 95.0 to 104.3%. The developed method provided potential application as a portable on-site iodine detector.
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9
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Chandra A, Maata M, Prasad S. Determination of iodine content in Fijian foods using spectrophotometric kinetic method. Microchem J 2019. [DOI: 10.1016/j.microc.2019.04.060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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HPLC-DAD Determination of Iodide in Mineral Waters on Phosphatidylcholine Column. Molecules 2019; 24:molecules24071243. [PMID: 30934973 PMCID: PMC6480323 DOI: 10.3390/molecules24071243] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Revised: 03/25/2019] [Accepted: 03/26/2019] [Indexed: 01/20/2023] Open
Abstract
Iodine is an essential nutrient necessary for the production of thyroid hormones. A valuable source of iodide, which is the bio-available iodine form could be mineral waters offered by different spas. In this work, the method capable of direct determination of iodide in mineral water samples based on IAM liquid chromatography on the phosphatidylcholine column (IAM.PC.DD2 Regis HPLC) with DAD detection without sample pretreatment or any pre-concentration steps is presented. The calibration graph for iodide was linear in the range of 0.5–10.0 mg L−1 with a correlation coefficient of 0.9996. The limit of detection was 22.84 ng mL−1. The relative recoveries were in the interval of 98.5–100.2% and the repeatability, expressed as a relative standard deviation (RSD) was less than 5%. The RSA (Response Surface Analysis) investigated the effect of the sample concentration and the injection volume. The iodide concentrations in the mineral water samples ranged from 0.58 to 2.88 mg L−1. The accuracy of the method was assessed through independent analysis by ICP-MS. Iodide levels measured by these two procedures did not significantly differ. The effects of interfering ions like HCO3−, Cl−, SO42−, F−, and Br− were also tested. The analysis has shown insignificant differences in the values of the iodide peak area and its height measured in multicomponent mixtures with an error smaller than 5%.
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Xie WQ, Yu KX, Gong YX. Determination of iodate in iodized edible salt based on a headspace gas chromatographic technique. J Chromatogr A 2019; 1584:187-191. [DOI: 10.1016/j.chroma.2018.12.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2018] [Revised: 12/01/2018] [Accepted: 12/09/2018] [Indexed: 01/31/2023]
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12
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Limchoowong N, Sricharoen P, Konkayan M, Techawongstien S, Chanthai S. A simple, efficient and economic method for obtaining iodate-rich chili pepper based chitosan edible thin film. Journal of Food Science and Technology 2018; 55:3263-3272. [PMID: 30065438 DOI: 10.1007/s13197-018-3260-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 05/11/2018] [Accepted: 05/28/2018] [Indexed: 11/26/2022]
Abstract
The present study was aimed at designing an iodine supplement in form of edible film made of iodate-coated chitosan (CS-IO3). Inclusion of so obtained films in diet can help in preventing thyroid cancer, leading to improved public health. Chili pepper was coated with iodate thin film (1.5 µm). The iodate-rich film is ready-to-eat serving valuable nutrients. Stability studies of CS-IO3 film using water dipping revealed that there was no leaching of iodate ion, due to the strong interactions between cationic amino group of chitosan and iodate ion. The film showed no change in its antioxidant activity. Iodate concentration in the film was determined at 620 nm selectively, based on the decolorization of malachite green economic method. Iodate content in fruits coated with 1.5% (w/v) CS-IO3 was 11.5 mg g-1 of dry film sample. The iodate-rich samples could be stored without much effect on its freshness, indicating a good shelf life.
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Affiliation(s)
- Nunticha Limchoowong
- 1Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, 123 Mittraphab Road, M. 16, T. Ni-Muang, A. Muang, Khon Kaen, 40002 Thailand
| | - Phitchan Sricharoen
- 1Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, 123 Mittraphab Road, M. 16, T. Ni-Muang, A. Muang, Khon Kaen, 40002 Thailand
| | - Mongkol Konkayan
- 1Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, 123 Mittraphab Road, M. 16, T. Ni-Muang, A. Muang, Khon Kaen, 40002 Thailand
| | - Suchila Techawongstien
- 2Department of Plant Science and Agricultural Resources, Faculty of Agriculture, Khon Kaen University, Khon Kaen, 40002 Thailand
| | - Saksit Chanthai
- 1Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, 123 Mittraphab Road, M. 16, T. Ni-Muang, A. Muang, Khon Kaen, 40002 Thailand
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Schneider S, Rudolph M, Bause V, Terfort A. Electrochemical removal of biofilms from titanium dental implant surfaces. Bioelectrochemistry 2018; 121:84-94. [PMID: 29413867 DOI: 10.1016/j.bioelechem.2018.01.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Revised: 01/15/2018] [Accepted: 01/15/2018] [Indexed: 10/18/2022]
Abstract
The infection of dental implants may cause severe inflammation of tissue and even bone degradation if not treated. For titanium implants, a new, minimally invasive approach is the electrochemical removal of the biofilms including the disinfection of the metal surface. In this project, several parameters, such as electrode potentials and electrolyte compositions, were varied to understand the underlying mechanisms. Optimal electrolytes contained iodide as well as lactic acid. Electrochemical experiments, such as cyclic voltammetry or measurements of open circuit potentials, were performed in different cell set-ups to distinguish between different possible reactions. At the applied potentials of E < -1.4 V, the hydrogen evolution reaction dominated at the implant surface, effectively lifting off the bacterial films. In addition, several disinfecting species are formed at the anode, such as triiodide and hydrogen peroxide. Ex situ tests with model biofilms of E. coli clearly demonstrated the effectiveness of the respective anolytes in killing the bacteria, as determined by the LIVE/DEAD™ assay. Using optimized electrolysis parameters of 30 s at 7.0 V and 300 mA, a 14-day old wildtype biofilm could be completely removed from dental implants in vitro.
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Affiliation(s)
- Sebastian Schneider
- Institute of Inorganic and Analytical Chemistry, Goethe-University, Max-von-Laue-Str. 7, D-60438 Frankfurt am Main, Germany
| | - Michael Rudolph
- Institute of Inorganic and Analytical Chemistry, Goethe-University, Max-von-Laue-Str. 7, D-60438 Frankfurt am Main, Germany
| | - Vanessa Bause
- Institute of Inorganic and Analytical Chemistry, Goethe-University, Max-von-Laue-Str. 7, D-60438 Frankfurt am Main, Germany
| | - Andreas Terfort
- Institute of Inorganic and Analytical Chemistry, Goethe-University, Max-von-Laue-Str. 7, D-60438 Frankfurt am Main, Germany.
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14
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Li Z, Liu R, Xing G, Wang T, Liu S. A novel fluorometric and colorimetric sensor for iodide determination using DNA-templated gold/silver nanoclusters. Biosens Bioelectron 2017; 96:44-48. [DOI: 10.1016/j.bios.2017.01.005] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Accepted: 01/04/2017] [Indexed: 11/24/2022]
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15
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Sötz VA, Kochmann S. Simultaneous separation and detection of anions and thiophilic cations using capillary-size anion exchange chromatography with suppressed conductivity detection. J Sep Sci 2015; 38:1301-9. [DOI: 10.1002/jssc.201401096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 01/05/2015] [Accepted: 01/25/2015] [Indexed: 02/04/2023]
Affiliation(s)
- Veronika Anna Sötz
- Institute of Analytical Chemistry; Chemo- and Biosensors; University of Regensburg; Regensburg Germany
| | - Sven Kochmann
- Institute of Analytical Chemistry; Chemo- and Biosensors; University of Regensburg; Regensburg Germany
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16
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Immobilized organoruthenium(II) complexes onto polyethyleneimine-wrapped carbon nanotubes/in situ formed gold nanoparticles as a novel electrochemical sensing platform. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 48:270-8. [DOI: 10.1016/j.msec.2014.12.034] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 11/05/2014] [Accepted: 12/05/2014] [Indexed: 11/21/2022]
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17
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Maity D, Bhatt M, Paul P. Calix[4]arene functionalized gold nanoparticles for colorimetric and bare-eye detection of iodide in aqueous media and periodate aided enhancement in sensitivity. Mikrochim Acta 2014. [DOI: 10.1007/s00604-014-1340-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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18
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Xia DH, Wang HH, Wang K, Fu CW, Wang JH. A novel electrochemical noise sensor applied to detect food safety. RUSS J ELECTROCHEM+ 2014. [DOI: 10.1134/s1023193514040089] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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19
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Zhang K, Liang L, Huang M, Hu Y, Li G. Determination of iodate in iodized salt and water samples by shell-isolated nanoparticle-enhanced Raman spectroscopy. Mikrochim Acta 2014. [DOI: 10.1007/s00604-014-1248-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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21
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Nellaiappan S, Kumar AS. Selective flow injection analysis of iodate in iodized table salts by riboflavin immobilized multiwalled carbon nanotubes chemically modified electrode. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.07.076] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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22
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Li YJ, Tseng YT, Unnikrishnan B, Huang CC. Gold-nanoparticles-modified cellulose membrane coupled with laser desorption/ionization mass spectrometry for detection of iodide in urine. ACS APPLIED MATERIALS & INTERFACES 2013; 5:9161-9166. [PMID: 23978046 DOI: 10.1021/am4025824] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report an efficient method for the determination of iodide (I(-)) ions by using gold-iodide hybrid cluster ions on gold nanoparticles (Au NPs) modified mixed cellulose ester membrane (Au NPs-MCEM) by pulsed laser desorption/ionization mass spectrometry (LDI-MS). When I(-) ions were deposited and concentrated on the surfaces of Au NPs (32 nm) via strong Au(+)-I(-) interaction on the MECM, the Au NPs-MCEM was observed to function as an efficient surface-assisted LDI substrate with very low background noise. When pulsed laser radiation (355 nm) was applied, I(-) binding to Au NPs ions induced the enhancement of the desorption and ionization efficiency of gold-iodide hybrid cluster ions from the Au NPs surfaces. The reproducibility of the probe for both shot-to-shot and sample-to-sample (both less than 10%) ion production was also improved by the homogeneous nature of the substrate surface. Thus, it allows the accurate and precise quantification of I(-) ions in high-salinity real samples (i.e., edible salt samples and urine) at the nanomolar range. This novel LDI-MS approach provides a simple route for the high-speed analysis of I(-) ions with high sensitivity and selectivity in real biological samples.
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Affiliation(s)
- Yu-Jia Li
- Institute of Bioscience and Biotechnology and ‡Center of Excellence for the Oceans, National Taiwan Ocean University , Keelung, 20224, Taiwan
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23
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Huang Z, Subhani Q, Zhu Z, Guo W, Zhu Y. A single pump cycling-column-switching technique coupled with homemade high exchange capacity columns for the determination of iodate in iodized edible salt by ion chromatography with UV detection. Food Chem 2013; 139:144-8. [DOI: 10.1016/j.foodchem.2013.01.070] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2012] [Revised: 12/12/2012] [Accepted: 01/27/2013] [Indexed: 11/27/2022]
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24
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Use of pressurized hot water extraction and high performance liquid chromatography–inductively coupled plasma–mass spectrometry for water soluble halides speciation in atmospheric particulate matter. Talanta 2012; 101:283-91. [DOI: 10.1016/j.talanta.2012.09.027] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 09/06/2012] [Accepted: 09/16/2012] [Indexed: 11/23/2022]
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25
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Xia D, Song S, Gong W, Jiang Y, Gao Z, Wang J. Detection of corrosion-induced metal release from tinplate cans using a novel electrochemical sensor and inductively coupled plasma mass spectrometer. J FOOD ENG 2012. [DOI: 10.1016/j.jfoodeng.2012.05.035] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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26
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Huang Z, Zhu Z, Subhani Q, Yan W, Guo W, Zhu Y. Simultaneous determination of iodide and iodate in povidone iodine solution by ion chromatography with homemade and exchange capacity controllable columns and column-switching technique. J Chromatogr A 2012; 1251:154-159. [DOI: 10.1016/j.chroma.2012.06.059] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Revised: 06/07/2012] [Accepted: 06/14/2012] [Indexed: 11/16/2022]
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27
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Flow injection analysis with amperometric detection for iodide determination as a tracer in seawater reservoirs. J APPL ELECTROCHEM 2012. [DOI: 10.1007/s10800-012-0435-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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28
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Development of anion-exchange/reversed-phase high performance liquid chromatography–inductively coupled plasma-mass spectrometry methods for the speciation of bio-available iodine and bromine from edible seaweed. J Chromatogr A 2012; 1236:164-76. [DOI: 10.1016/j.chroma.2012.03.019] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Revised: 02/09/2012] [Accepted: 03/04/2012] [Indexed: 11/15/2022]
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29
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Abdolmohammad-Zadeh H, Tavarid K, Talleb Z. Determination of iodate in food, environmental, and biological samples after solid-phase extraction with Ni-Al-Zr ternary layered double hydroxide as a nanosorbent. ScientificWorldJournal 2012; 2012:145482. [PMID: 22619590 PMCID: PMC3349096 DOI: 10.1100/2012/145482] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2011] [Accepted: 12/15/2011] [Indexed: 11/17/2022] Open
Abstract
Nanostructured nickel-aluminum-zirconium ternary layered double hydroxide was successfully applied as a solid-phase extraction sorbent for the separation and pre-concentration of trace levels of iodate in food, environmental and biological samples. An indirect method was used for monitoring of the extracted iodate ions. The method is based on the reaction of the iodate with iodide in acidic solution to produce iodine, which can be spectrophotometrically monitored at 352 nm. The absorbance is directly proportional to the concentration of iodate in the sample. The effect of several parameters such as pH, sample flow rate, amount of nanosorbent, elution conditions, sample volume, and coexisting ions on the recovery was investigated. In the optimum experimental conditions, the limit of detection (3s) and enrichment factor were 0.12 μg mL(-1) and 20, respectively. The calibration graph using the preconcentration system was linear in the range of 0.2-2.8 μg mL(-1) with a correlation coefficient of 0.998. In order to validate the presented method, a certified reference material, NIST SRM 1549, was also analyzed.
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Affiliation(s)
- Hossein Abdolmohammad-Zadeh
- Department of Chemistry, Faculty of Sciences, Azarbaijan University of Tarbiat Moallem, 35 Km Tabriz-Marageh Road, P.O. Box 53714-161, 5375171379 Tabriz, Iran.
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30
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Shabani AMH, Ellis PS, McKelvie ID. Spectrophotometric determination of iodate in iodised salt by flow injection analysis. Food Chem 2011; 129:704-707. [DOI: 10.1016/j.foodchem.2011.04.077] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2010] [Revised: 04/14/2011] [Accepted: 04/24/2011] [Indexed: 10/18/2022]
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31
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Vitali L, Horst BL, Heller M, Fávere VT, Micke GA. Using multiple short-end injections to develop fast electrophoretic separations—Applications in iodide analysis. J Chromatogr A 2011; 1218:4586-91. [DOI: 10.1016/j.chroma.2011.04.084] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Revised: 04/25/2011] [Accepted: 04/28/2011] [Indexed: 11/16/2022]
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32
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Spectrophotometric determination of trace amounts of iodide-ions in form of ionic associate with brilliant green using electrochemical oxidation. OPEN CHEM 2011. [DOI: 10.2478/s11532-011-0020-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AbstractA combined method involving electrochemical oxidation of iodide to iodate at a platinum electrode followed by extraction in CCl4 of ionic associates of iodine-iodide complexes with brilliant green, formed in excess of iodide, was developed for the spectrophotometric quantification of iodide. The slope of the calibration curve yields a molar extinction coefficient of ɛ = 3·105 L mol−1cm−1. This method can be used for the quantification of iodide in the concentration range of 3·10−7 − 3·10−6 mol L−1 with a detection limit of 5·10−8 mol L−1. The interfering effect of other ions on the determination of the iodide concentration was also investigated. The method was successfully applied for the determination of iodide in real samples of NaCl and spring water. Relative standard deviation is 1–2%.
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