2014 IEEE 9th IberoAmerican Congress on Sensors最新文献

Chitosan/bentonite nanocomposite: Preliminary studies of its potentiometric response to nitrate ions in water 壳聚糖/膨润土纳米复合材料对水中硝酸盐离子电位响应的初步研究

2014 IEEE 9th IberoAmerican Congress on Sensors Pub Date : 2014-12-29 DOI: 10.1109/IBERSENSOR.2014.6995562

Moises Oviedo Mendoza, Erika Padilla Ortega, O. Arias de Fuentes, Y. Prokhorov, J. Gabriel Luna Barcenas

{"title":"Chitosan/bentonite nanocomposite: Preliminary studies of its potentiometric response to nitrate ions in water","authors":"Moises Oviedo Mendoza, Erika Padilla Ortega, O. Arias de Fuentes, Y. Prokhorov, J. Gabriel Luna Barcenas","doi":"10.1109/IBERSENSOR.2014.6995562","DOIUrl":"https://doi.org/10.1109/IBERSENSOR.2014.6995562","url":null,"abstract":"The scope of this work is to obtain and characterize a nanobiocomposite as Ion Selective Electrodes (ISE) for nitrate ion determination in water. This nanocomposite is based upon the intercalation of chitosan, a cationic biopolymer, in bentonite. Chitosan (CS)/bentonite nanocomposites were prepared by ionic exchange. The amino groups in the CS can be protonated in acidic solution and they can replace the interlayer cation on the clay surface. Nitrate (II) was added at the end of the preparation process for blocking the cationic exchange sites and enhance the potentiometric response to nitrate. Chitosan/bentonite films were obtained by solvent cast method. X-Ray Diffraction (XRD), X-Ray Photoelectron Spectroscopy (XPS) and Fourier-Transformed-Infrared Spectroscopy (FTIR) were used to characterize the nanocomposites. These studies confirm that the chitosan was intercalated into the bentonite interlayer spacing due to the electrostatic attraction between NH3+ groups and the negatively charge bentonite surface. These measurements confirm that there exist possibilities to reverse the ion exchange of this nanocomposite. Potentiometric measurements were performed using an Ag/AgCl reference electrode and an ISE with chitosan/bentonite membranes deposited on a graphite-epoxy electrode as a working electrode. A linear fitting was performed between 2×10-4M and 8×10-1M of concentration with a near Nernstian slope of -54.6 mV/dec. The selectivity towards some interfering ions was calculated according to the Separate Solution Method (SSM).","PeriodicalId":296271,"journal":{"name":"2014 IEEE 9th IberoAmerican Congress on Sensors","volume":"os-30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127864521","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: 7

Use of sensors in cheese manufacture and quality control 传感器在奶酪生产和质量控制中的应用

2014 IEEE 9th IberoAmerican Congress on Sensors Pub Date : 2014-12-29 DOI: 10.1109/IBERSENSOR.2014.6995547

M. Gomes, J. A. Oliveira, E. M. Gaspar

引用次数: 2

pH sensors based in TiO2 NTs arrays 基于TiO2纳米管阵列的pH传感器

2014 IEEE 9th IberoAmerican Congress on Sensors Pub Date : 2014-12-29 DOI: 10.1109/IBERSENSOR.2014.6995523

P. Marques, G. Z. Monteiro, I. Pereyra, K. F. Albertin

引用次数: 1

Alcohols detection based on Pd-doped SnO2 sensors 基于pd掺杂SnO2传感器的醇类检测

2014 IEEE 9th IberoAmerican Congress on Sensors Pub Date : 2014-12-29 DOI: 10.1109/IBERSENSOR.2014.6995514

A. L. Paredes-Doig, Maria del Rosario Sun-Kou, G. Comina

引用次数: 5

Wireless zero-power small displacement sensors 无线零功率小位移传感器

2014 IEEE 9th IberoAmerican Congress on Sensors Pub Date : 2014-12-29 DOI: 10.1109/IBERSENSOR.2014.6995561

N. M. Cerón-Hurtado, Jordi Aguiló Llobet

引用次数: 1

Flow-injection amperometric sensor for quantification and speciation of iron 用于铁的定量和形态分析的流动注射安培传感器

2014 IEEE 9th IberoAmerican Congress on Sensors Pub Date : 2014-12-29 DOI: 10.1109/IBERSENSOR.2014.6995519

Albert Saavedra, E. Cortón

{"title":"Flow-injection amperometric sensor for quantification and speciation of iron","authors":"Albert Saavedra, E. Cortón","doi":"10.1109/IBERSENSOR.2014.6995519","DOIUrl":"https://doi.org/10.1109/IBERSENSOR.2014.6995519","url":null,"abstract":"In the bio-mining industry there are various compounds which need to be frequently monitored, one of which is iron, since its concentration can seriously affect the industrial process. This study describes the development of an electrochemical method of speciation and rapid quantification of iron in bio-mining processes conditions. Speciation and quantification was carried out in a flow injection system using techniques of cyclic voltammetry and chronoamperometry. The proposed and a standard method were used to compare the results obtained from simulated and real mixed (ferric/ferrous) samples. Cyclic voltammograms presented two peaks corresponding to the ferric ion reduction of and ferrous ion oxidation. Chronoamperometry allow the construction of calibration curves for both ions. Quantification of real and simulated samples showed acceptable levels of error compared to a standard method. The electrochemical method allowed in a simple and rapid way the speciation and quantification of iron in mixed samples, including real samples from acid mine drainage, which established the basis for the development of an automated process monitoring device.","PeriodicalId":296271,"journal":{"name":"2014 IEEE 9th IberoAmerican Congress on Sensors","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115840236","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

Experimental evaluation of energy efficient algorithms for WSN using variable transmission powers 可变传输功率无线传感器网络节能算法的实验评估

2014 IEEE 9th IberoAmerican Congress on Sensors Pub Date : 2014-12-29 DOI: 10.1109/IBERSENSOR.2014.6995507

Jose Mauricio Nava Auza, A. Branco, J.R. Boisson de Marca

引用次数: 1

Water-in-diesel nanoemulsion by LTCC microfluidic devices 用LTCC微流控装置制备柴油水纳米乳

2014 IEEE 9th IberoAmerican Congress on Sensors Pub Date : 2014-12-29 DOI: 10.1109/IBERSENSOR.2014.6995546

J. N. Schianti, M. Gongora-Rubio, Thais Aragão Horoiwa, N. N. Cerize, A. M. Oliveira

引用次数: 3

TEOS and TEOS/HFE plasma thin films used in electrochemical measurements 用于电化学测量的TEOS和TEOS/HFE等离子体薄膜

2014 IEEE 9th IberoAmerican Congress on Sensors Pub Date : 2014-12-29 DOI: 10.1109/IBERSENSOR.2014.6995510

L. Hernandez, M. L. P. Da Silva, R. R. Lima, F. L. Almeida, S. G. Santos Fo

引用次数: 0

Design and implementation of a planar capacitive pressure sensor 平面电容式压力传感器的设计与实现

2014 IEEE 9th IberoAmerican Congress on Sensors Pub Date : 2014-12-29 DOI: 10.1109/IBERSENSOR.2014.6995536

E. Unigarro, Alvaro U. Achury, J. Bohórquez, Jordi Sacristan Riquelme, F. Segura-Quijano

{"title":"Design and implementation of a planar capacitive pressure sensor","authors":"E. Unigarro, Alvaro U. Achury, J. Bohórquez, Jordi Sacristan Riquelme, F. Segura-Quijano","doi":"10.1109/IBERSENSOR.2014.6995536","DOIUrl":"https://doi.org/10.1109/IBERSENSOR.2014.6995536","url":null,"abstract":"In this paper we present the implementation of a capacitive pressure sensor using interdigitated electrodes and a polymer cavity, the sensor functionality is based on the compression of a sealed cavity which changes the dielectric properties on top of two planar interdigitated electrodes (IDE). COMSOL was used to perform multiphysics simulations of the mechanical and electrical behavior of the sensor. The fabrication process of the sensor was made in tree steps: the interdigitated electrodes were fabricated using copper on a FR4 substrate, a sealed cavity of polydimethylsiloxane (PDMS) was built using FR4 molds, and finally the cavity and IDE were assembled with a thin layer of PDMS. The IDE electrodes are composed of 21 fingers and had a squared area of 11×11 mm, the PDMS cavity had an area of 11×11 mm with a height of 900 μm. A precision LCR meter (Agilent 4248A) was used to measure the capacitance variations caused by the pressure changes, the sensor was tested in the range of 0 to 40 psi and has a sensitivity of 3.35 fF/psi. Simulations were used to study the possibility of using functionalized polymers to increase the sensor sensitivity; the aim of this work is to present the design and fabrication process for a planar capacitive sensor, this design requires less fabrication steps than common micro-electromechanicals systems (MEMS) pressure sensors reducing the production costs of the pressure sensors, also allowing new types of integrations.","PeriodicalId":296271,"journal":{"name":"2014 IEEE 9th IberoAmerican Congress on Sensors","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114526673","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: 4