Sensor Letters最新文献_第7页

Investigation of the Electrochemical Behavior of Hydroquinone at Some Conducting Polymer Electrodes and Amperometric Detection 对苯二酚在导电聚合物电极上的电化学行为及安培检测研究

Sensor Letters Pub Date : 2020-04-01 DOI: 10.1166/sl.2020.4213

G. Erdoğdu

{"title":"Investigation of the Electrochemical Behavior of Hydroquinone at Some Conducting Polymer Electrodes and Amperometric Detection","authors":"G. Erdoğdu","doi":"10.1166/sl.2020.4213","DOIUrl":"https://doi.org/10.1166/sl.2020.4213","url":null,"abstract":"In this paper, a rapid and sensitive modified electrode for the determination of hydroquinone (HQ) is proposed. In this study, active compound HQ was determined from commercial drug form based on electrochemical oxidation properties at various electrodes by voltammetric methods. Electrodes\u0000 modified by the electrodeposition of conducting organic polymers such as poly(3-methylthiophene, PMT), polypyrrole (PPY) and polyaniline (PAN) were used as chemical sensors for voltammetric analysis and flow injection detection of HQ. The electrochemical behavior of HQ at conducting polymer\u0000 electrodes was compared and the effects on behavior of electrolyte type and its pH and the film thickness were systematically examined. The results showed that the proposed modified surface catalyzes the oxidation of HQ. Electrocatalytic efficiency decreases in order of PMT > PPY > PAN.\u0000 Voltammetric peak positions were affected by the nature of the electrolyte and its pH. Also, the effect of increasing film thickness was to observe increased peak heights for oxidation potential of HQ. The best results for the determination of HQ were obtained by DPV in Na2SO4\u0000 (pH 2.0) and PMT electrodes. Polymer coated electrodes were also used in an amperometric detector for flow injection analysis of HQ. The responses of the polymer electrode were 5–15 times larger as compared to those of bare platinum. PMT showed improved performance as an amperometric\u0000 detector for flow injection analysis systems over other types of polymer electrodes. Detection limits as low as 1 × 10–9 M were achieved using the PMT, compared to 1 × 10–6 M using platinum electrodes.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"11 1","pages":"241-245"},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86275449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemical Behavior and Voltammetric Determination of Losartan Using Carbon Ceramic Electrode Modified with Room Temperature Ionic Liquid 用室温离子液体修饰碳陶瓷电极测定氯沙坦的电化学行为和伏安法

Sensor Letters Pub Date : 2020-04-01 DOI: 10.1166/sl.2020.4223

Mahzad Firouzi, M. Giahi, M. Najafi, S. Homami, Seyed Husain Hashemi Mousavi

引用次数: 0

Performance Comparison of Secure Communication in Mobile Ad Hoc NETwork Using Intrusion Detection Techniques 基于入侵检测技术的移动自组网安全通信性能比较

Sensor Letters Pub Date : 2020-04-01 DOI: 10.1166/sl.2020.4227

D. Suganya, A. Babu

引用次数: 0

Flexible Liquid Sensor Based on Rubber/Graphite Composite 基于橡胶/石墨复合材料的柔性液体传感器

Sensor Letters Pub Date : 2020-04-01 DOI: 10.1166/sl.2020.4217

M. Khabiri, M. S. Tagharoodi, Mohammad Reza Pourhossainy, M. Abbasi, Mohamoud Razavizade

{"title":"Flexible Liquid Sensor Based on Rubber/Graphite Composite","authors":"M. Khabiri, M. S. Tagharoodi, Mohammad Reza Pourhossainy, M. Abbasi, Mohamoud Razavizade","doi":"10.1166/sl.2020.4217","DOIUrl":"https://doi.org/10.1166/sl.2020.4217","url":null,"abstract":"Hydrocarbon liquids such as gasoline, diesel, jet fuel, and solvents are hazardous materials derived from petroleum. These materials can diffuse the rubber network structures and cause swelling in these polymers. Rubber materials containing conductive fillers exhibit a high conductivity\u0000 at the higher percolation threshold. As direct effect of solvent on the polymer, swelling in the rubber composite alters the structure of the filler network and subsequently the composite properties change significantly. This Process can be considered as a signal for solvent or hydrocarbon\u0000 fuel detector system and used conductive rubber composite as a flexible sensor. In this study, the nitrile/graphite composite samples were prepared containing different amounts of graphite particles. These samples have the ability to measure electrical resistance. The electrical resistance\u0000 of rubber/graphite samples decreases with increasing content of graphite particles. The increase in the electrical resistance of the specimens was measured by using conductive composite swelling in toluene solvent and it was observed that all specimens eventually became electrical insulation.\u0000 Samples with concentrations of 60, 70, and 80 phr are conductive after recovery and solvent removal. While their conductivity is less than that of the virgin samples. The incremental trend of electrical resistance against the conductive composite swelling was measured in toluene solvent and\u0000 it was observed that all samples were eventually converted to electrical insulation. But there is little difference between the third swelling process and the second one. This phenomenon has occurred for all three samples, which reveals a good similarity with the Mullins effect.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"27 1","pages":"246-252"},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89602396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sensitive Determination of Epinephrine in the Presence of Ascorbic Acid at Poly(diphenylamine sulfonic acid) Modified Sensor 聚二苯胺磺酸修饰传感器灵敏测定抗坏血酸存在下的肾上腺素

Sensor Letters Pub Date : 2020-04-01 DOI: 10.1166/sl.2020.4228

G. Erdoğdu

引用次数: 0

Electrochemical Detection of Epinephrine at Organic Conducting Polymers Electrodes 有机导电聚合物电极上肾上腺素的电化学检测

Sensor Letters Pub Date : 2020-03-01 DOI: 10.1166/sl.2020.4204

G. Erdoğdu

{"title":"Electrochemical Detection of Epinephrine at Organic Conducting Polymers Electrodes","authors":"G. Erdoğdu","doi":"10.1166/sl.2020.4204","DOIUrl":"https://doi.org/10.1166/sl.2020.4204","url":null,"abstract":"In this paper, a rapid and sensitive modified electrode for the determination of Epinephrine (EP) is proposed. In this study, active compound EP was determined from commercial drug form based on electrochemical oxidation properties at various electrodes by voltammetric methods. Electrodes\u0000 modified by the electrodeposition of conducting organic polymers such as poly(3-methylthiophene, PMT), polypyrrole (PPY) and polyaniline (PAN) were used as chemical sensors for voltammetric analysis and flow injection detection of EP. The electrochemical behavior of EP at conducting polymer\u0000 electrodes was compared and the effects on behavior of electrolyte type and its pH and the film thickness were systematically examined. The results showed that the proposed modified surface catalyzes the oxidation of EP. Electrocatalytic efficiency decreases in order of PMT > PPY > PAN.\u0000 Voltammetric peak positions were affected by the nature of the electrolyte and its pH. Also, the effect of increasing film thickness was to observe increased peak heights for oxidation potential of EP. The best results for the determination of EP were obtained by DPV in Na2SO4\u0000 (pH 2.0) and PMT electrodes. Polymer coated electrodes were also used in an amperometric detector for flow injection analysis of EP. The responses of the polymer electrode were 5–15 times larger as compared to those of bare platinum. PMT showed improved performance as an amperometric\u0000 detector for flow injection analysis systems over other types of polymer electrodes. Detection limits as low as 1× 10–9 M were achieved using the PMT, compared to 1 × 10–6 M using platinum electrodes.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"90 1","pages":"173-178"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80456256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Selective Voltammetric Detection of Dopamine in the Presence of Ascorbic Acid at Poly(p-methoxyphenol)-Modified Electrode 聚对甲氧基酚修饰电极上抗坏血酸存在下多巴胺的选择性伏安检测

Sensor Letters Pub Date : 2020-03-01 DOI: 10.1166/sl.2020.4206

G. Erdoğdu

引用次数: 0

Tramadol, Methadone and Buprenorphine-AuNPs Kit Based on Chemometrics Tools and Software 基于化学计量学工具和软件的曲马多，美沙酮和丁丙诺啡- aunps试剂盒

Sensor Letters Pub Date : 2020-03-01 DOI: 10.1166/sl.2020.4212

Sakineh Alizadeh, M. Hasanzadeh, Ali Irandoost

{"title":"Tramadol, Methadone and Buprenorphine-AuNPs Kit Based on Chemometrics Tools and Software","authors":"Sakineh Alizadeh, M. Hasanzadeh, Ali Irandoost","doi":"10.1166/sl.2020.4212","DOIUrl":"https://doi.org/10.1166/sl.2020.4212","url":null,"abstract":"The SPR of the AuNPs, synthesized by the reduction of gold ion with citrate and modified with L-cysteine was used as a novel analytical method for the detection and determination of drugs and species based on aggregation of Au-nanoparticles. However, multivariate calibration modeling\u0000 of the SPR absorbance data by chemometrics method resulted in more accurate results out-comes so that the relative prediction errors were almost lower than 5%. In comparison with the available analytical methods for highly selective and sensitive ternary determination of tramadol, methadone\u0000 and buprenorphine the proposed method is in need of lower amounts of reagents. Through increasing the concentration of the Opiate and Fluent material, a visible color change of AuNPs from wine red to blue was observed so the obvious color change was easily noticeable by naked eyes. However,\u0000 multivariate calibration modelling and 3-d way methods that used for the SPR absorbance data by PARAFAC resulted in more accurate outcomes so that the software, as well as the chemometrics and the solvent kit, with great assurance our kit is unique. PARAFAC is a multi-way method originating\u0000 from psychometrics. Due to various reasons such as high computational power, awareness of the method and its possibilities, the increased complexity complication of the data dealt with in science and industry, is gaining more attention in chemometrics and associated areas.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"565 1","pages":"227-235"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85727168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Hg(II) Analysis Using Poly(cysteine)-rGO Electrode 聚(半胱氨酸)-氧化石墨烯电极分析汞(II

Sensor Letters Pub Date : 2020-03-01 DOI: 10.1166/sl.2020.4202

J. J. Feminus, P. Deepa

引用次数: 0

An Innovative Synthesis of Spinel-Structured and Ferromagnetic Behaviour of Fe3O4 Nanoparticles Antibacterial and Catalytic Activity Evaluated in the Selective Oxidation 尖晶石结构Fe3O4纳米粒子的创新合成及铁磁行为在选择性氧化中的抗菌和催化活性评价

Sensor Letters Pub Date : 2020-03-01 DOI: 10.1166/sl.2020.4214

S. Ambika, K. Saravanan

引用次数: 0