Pub Date : 2014-12-29DOI: 10.1109/IBERSENSOR.2014.6995509
L. Hernandez, M. L. P. Da Silva, R. R. Lima, V. F. Cardoso
This work aims to humidity and VOCs measurement using TEOS films or TEOS/HFE composites. Films, exposed or not to ultraviolet, were tested on cycles of relative humidity ranging from 25% to 85% and VOCs interference were also evaluated. TEOS films showed good reproducibility up to 85% relative humidity but quick reaction on 90%. The best detection limit was 100 ppm, using TEOS films exposed to UVC and TEOS/HFE composites show sensitivity of 4 Hz/% humidity, but interdigitated electrodes quickly saturate. VOCs were detected in the 1% w/w in air and do not interfere in the relative humidity detection.
{"title":"TEOS plasma polymerized films: Impact of clustered material in humidity measurement","authors":"L. Hernandez, M. L. P. Da Silva, R. R. Lima, V. F. Cardoso","doi":"10.1109/IBERSENSOR.2014.6995509","DOIUrl":"https://doi.org/10.1109/IBERSENSOR.2014.6995509","url":null,"abstract":"This work aims to humidity and VOCs measurement using TEOS films or TEOS/HFE composites. Films, exposed or not to ultraviolet, were tested on cycles of relative humidity ranging from 25% to 85% and VOCs interference were also evaluated. TEOS films showed good reproducibility up to 85% relative humidity but quick reaction on 90%. The best detection limit was 100 ppm, using TEOS films exposed to UVC and TEOS/HFE composites show sensitivity of 4 Hz/% humidity, but interdigitated electrodes quickly saturate. VOCs were detected in the 1% w/w in air and do not interfere in the relative humidity detection.","PeriodicalId":296271,"journal":{"name":"2014 IEEE 9th IberoAmerican Congress on Sensors","volume":"148 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":"116527998","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}
Pub Date : 2014-12-29DOI: 10.1109/IBERSENSOR.2014.6995530
M. Vazquez, Rodolfo Petrearce, J. Duran, P. Acevedo
The objective of this work is to use the Finite Element Method (FEM) to simulate the performance of a PVDF transducer array to measure temperature gradients through the determination of phase shifts, i.e. time shifts of the waveform of the echo due to a change in the speed of propagation of ultrasound as a result of a change in temperature, they can be interpreted as phase shifts in the frequency domain. Making it possible to determine the change in temperature from the phase shifts; in a medium of propagation previously characterized.
{"title":"Simulation of a PVDF transducer array using the finite element method (FEM) to measure temperature gradients in a soft tissue","authors":"M. Vazquez, Rodolfo Petrearce, J. Duran, P. Acevedo","doi":"10.1109/IBERSENSOR.2014.6995530","DOIUrl":"https://doi.org/10.1109/IBERSENSOR.2014.6995530","url":null,"abstract":"The objective of this work is to use the Finite Element Method (FEM) to simulate the performance of a PVDF transducer array to measure temperature gradients through the determination of phase shifts, i.e. time shifts of the waveform of the echo due to a change in the speed of propagation of ultrasound as a result of a change in temperature, they can be interpreted as phase shifts in the frequency domain. Making it possible to determine the change in temperature from the phase shifts; in a medium of propagation previously characterized.","PeriodicalId":296271,"journal":{"name":"2014 IEEE 9th IberoAmerican Congress on Sensors","volume":"35 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":"122017417","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}
Pub Date : 2014-12-29DOI: 10.1109/IBERSENSOR.2014.6995522
A. Hilding Ohlsson, M. C. Bonetto, N. Sacco, E. Cortón
Based on the classical Gram staining technique we created an adapted protocol so it could be used in bacterial suspensions for Gram positive and negative bacteria. The differences between these two types are determined by spectrophotometry. This is a rapid and low cost procedure to classify bacteria.
{"title":"Development of an optical sensor for rapid and automatic gram classification of microorganisms","authors":"A. Hilding Ohlsson, M. C. Bonetto, N. Sacco, E. Cortón","doi":"10.1109/IBERSENSOR.2014.6995522","DOIUrl":"https://doi.org/10.1109/IBERSENSOR.2014.6995522","url":null,"abstract":"Based on the classical Gram staining technique we created an adapted protocol so it could be used in bacterial suspensions for Gram positive and negative bacteria. The differences between these two types are determined by spectrophotometry. This is a rapid and low cost procedure to classify bacteria.","PeriodicalId":296271,"journal":{"name":"2014 IEEE 9th IberoAmerican Congress on Sensors","volume":"49 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":"121932262","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}
Pub Date : 2014-12-29DOI: 10.1109/IBERSENSOR.2014.6995553
Carlos M. Florez, Juan Villa
The problem of state estimation has great relevance in the chemical industry, since many chemical processes involve state variables that are difficult to measure online. This paper compares four different state estimation techniques applied to the model of a continuous stirred tank reactor with three state variables. The estimators employed are an extended Luenberger observer, an extended Kalman filter, a nonlinear sliding mode observer, and a nonlinear sliding mode observer with Kalman-filtered feed. The similarity of the models, for the state estimators, could allow applying them, to perform angular control of power systems with phasor measurement unit sensors (PMUs). The Matlab tool has being used to estimate the dynamic response of the estimated variables and the measurement error.
{"title":"Sensor based state estimation for: Stirred tank reactors in chemical industry and for PMUs in angle controlled power systems","authors":"Carlos M. Florez, Juan Villa","doi":"10.1109/IBERSENSOR.2014.6995553","DOIUrl":"https://doi.org/10.1109/IBERSENSOR.2014.6995553","url":null,"abstract":"The problem of state estimation has great relevance in the chemical industry, since many chemical processes involve state variables that are difficult to measure online. This paper compares four different state estimation techniques applied to the model of a continuous stirred tank reactor with three state variables. The estimators employed are an extended Luenberger observer, an extended Kalman filter, a nonlinear sliding mode observer, and a nonlinear sliding mode observer with Kalman-filtered feed. The similarity of the models, for the state estimators, could allow applying them, to perform angular control of power systems with phasor measurement unit sensors (PMUs). The Matlab tool has being used to estimate the dynamic response of the estimated variables and the measurement error.","PeriodicalId":296271,"journal":{"name":"2014 IEEE 9th IberoAmerican Congress on Sensors","volume":"99 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":"124492497","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}
Pub Date : 2014-12-29DOI: 10.1109/IBERSENSOR.2014.6995516
M. C. Bonetto, N. Sacco, A. Hilding Ohlsson, E. Cortón, D. Sticker, V. Charwat, P. Ertl
Microinterdigitated electrode structures (μIDES) have widely been used for electrochemical cell impedance spectroscopy (ECIS). For instance ECIS has been used to study biofilm formation and growth of a wide range of microorganisms to detect bacterial infections, food contaminations, biocorrosion, and biofouling. In this study we describe the development of a label-free bioassay to determine the presence of different bacteria strains using ECIS. Following initial characterization of embedded gold μIDES using solutions of increasing conductivities, impedance spectra ranging from 10Hz to 300 kHz in the presence of Bacillus subtilis DMS10 and Shewanella oneidensis MR-1 were recorded over a period of approx. 5 hours. Frequency analysis showed that at 30 Hz the impedance response differences were higher and the relative standard deviations were smaller between each strain and the medium. In contrast to standard cell impedance sensing, which is performed at frequencies higher than 10 kHz to detect cell membrane polarizations, our low frequency results indicate that ionic changes at the electrode-solution double layer (Cdt) resulting by individual bacterial metabolism, can also be used to non-invasively and label-free differentiate microorganisms.
{"title":"Rapid and label-free differentiation of bacterial strains using low frequency electrochemical impedance spectroscopy","authors":"M. C. Bonetto, N. Sacco, A. Hilding Ohlsson, E. Cortón, D. Sticker, V. Charwat, P. Ertl","doi":"10.1109/IBERSENSOR.2014.6995516","DOIUrl":"https://doi.org/10.1109/IBERSENSOR.2014.6995516","url":null,"abstract":"Microinterdigitated electrode structures (μIDES) have widely been used for electrochemical cell impedance spectroscopy (ECIS). For instance ECIS has been used to study biofilm formation and growth of a wide range of microorganisms to detect bacterial infections, food contaminations, biocorrosion, and biofouling. In this study we describe the development of a label-free bioassay to determine the presence of different bacteria strains using ECIS. Following initial characterization of embedded gold μIDES using solutions of increasing conductivities, impedance spectra ranging from 10Hz to 300 kHz in the presence of Bacillus subtilis DMS10 and Shewanella oneidensis MR-1 were recorded over a period of approx. 5 hours. Frequency analysis showed that at 30 Hz the impedance response differences were higher and the relative standard deviations were smaller between each strain and the medium. In contrast to standard cell impedance sensing, which is performed at frequencies higher than 10 kHz to detect cell membrane polarizations, our low frequency results indicate that ionic changes at the electrode-solution double layer (Cdt) resulting by individual bacterial metabolism, can also be used to non-invasively and label-free differentiate microorganisms.","PeriodicalId":296271,"journal":{"name":"2014 IEEE 9th IberoAmerican Congress on Sensors","volume":"24 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":"125140140","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}
Pub Date : 2014-12-29DOI: 10.1109/IBERSENSOR.2014.6995555
M. C. John, Barbosa P. Natalia
This project was made to develop a multisensory tool with a biometric approach, so the individual can evaluate some of his own characteristics, and actual or future conditions in him. For its development some sensors are involved: ultrasonic, temperature, resistant, infrared, etc. Between the possible variables evaluated we have the body temperature, the height, the sensibility, the patient strength, and some more internal factors like heart rate, oxygen saturation and average pressure. It also pretends to relate some sensors, so with them other type of conditions can be determined, like carpal tunnel syndrome, a condition involving not only sensibility but also strength, affecting and reducing them on the same way. The implementation of this tool wants to involve the individual with his own health, with the possible conditions he could have; it wants to direct and apply some sensors that sometimes are considered inapplicable and unnecessary because we don't know their potential or possible functionality.
{"title":"Domestic multisensory portable system application for general biometric diagnostic","authors":"M. C. John, Barbosa P. Natalia","doi":"10.1109/IBERSENSOR.2014.6995555","DOIUrl":"https://doi.org/10.1109/IBERSENSOR.2014.6995555","url":null,"abstract":"This project was made to develop a multisensory tool with a biometric approach, so the individual can evaluate some of his own characteristics, and actual or future conditions in him. For its development some sensors are involved: ultrasonic, temperature, resistant, infrared, etc. Between the possible variables evaluated we have the body temperature, the height, the sensibility, the patient strength, and some more internal factors like heart rate, oxygen saturation and average pressure. It also pretends to relate some sensors, so with them other type of conditions can be determined, like carpal tunnel syndrome, a condition involving not only sensibility but also strength, affecting and reducing them on the same way. The implementation of this tool wants to involve the individual with his own health, with the possible conditions he could have; it wants to direct and apply some sensors that sometimes are considered inapplicable and unnecessary because we don't know their potential or possible functionality.","PeriodicalId":296271,"journal":{"name":"2014 IEEE 9th IberoAmerican Congress on Sensors","volume":"43 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":"130850464","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}
Pub Date : 2014-12-29DOI: 10.1109/IBERSENSOR.2014.6995535
M. Jaramillo, P. A. Marin, R. A. Torres, E. Pabón, Y. Montagut, J. Robledo, M. Moreno, J. J. Manclús, Á. Montoya
The progress in the development of a piezoelectric immunosensor for the detection of a secretion protein (38 kDa) from Mycobacterium tuberculosis are described. A high affinity and specificity monoclonal antibody was obtained from a recombinant form of the target protein. This immunoreagent was employed for the development of a competitive ELISA, as a previous diagnostic test and reference assay for the characterization of the future biosensor. The ELISA detection limit was 14 ng/mL of the 38kDa antigen. The first experimental approach to the piezoelectric immunosensor was undertaken using bovine serum albumin (BSA) as a model antigen and 10 MH piezoelectric crystals as the biosensor transducer element. The obtained results show that high frequency crystals (≥ 100 MHz) should be used in order to reach the high sensitivity required for diagnostic purposes. These crystals would allow obtaining high and stable assay signals using very low protein concentrations for crystal functionalization, thus enhancing immunosensor sensitivity. Preliminary experiments have proved the successful and efficient immobilization of the 38 kDa antigen on high fundamental frequency (HFF) crystals (100 MHz). Moreover, the functionalized surface seems to be able to selectively bind the monoclonal antibody specific to the target antigen.
{"title":"Advances in the development of a piezoelectric immunosensor for the detection of a tuberculosis biomarker","authors":"M. Jaramillo, P. A. Marin, R. A. Torres, E. Pabón, Y. Montagut, J. Robledo, M. Moreno, J. J. Manclús, Á. Montoya","doi":"10.1109/IBERSENSOR.2014.6995535","DOIUrl":"https://doi.org/10.1109/IBERSENSOR.2014.6995535","url":null,"abstract":"The progress in the development of a piezoelectric immunosensor for the detection of a secretion protein (38 kDa) from Mycobacterium tuberculosis are described. A high affinity and specificity monoclonal antibody was obtained from a recombinant form of the target protein. This immunoreagent was employed for the development of a competitive ELISA, as a previous diagnostic test and reference assay for the characterization of the future biosensor. The ELISA detection limit was 14 ng/mL of the 38kDa antigen. The first experimental approach to the piezoelectric immunosensor was undertaken using bovine serum albumin (BSA) as a model antigen and 10 MH piezoelectric crystals as the biosensor transducer element. The obtained results show that high frequency crystals (≥ 100 MHz) should be used in order to reach the high sensitivity required for diagnostic purposes. These crystals would allow obtaining high and stable assay signals using very low protein concentrations for crystal functionalization, thus enhancing immunosensor sensitivity. Preliminary experiments have proved the successful and efficient immobilization of the 38 kDa antigen on high fundamental frequency (HFF) crystals (100 MHz). Moreover, the functionalized surface seems to be able to selectively bind the monoclonal antibody specific to the target antigen.","PeriodicalId":296271,"journal":{"name":"2014 IEEE 9th IberoAmerican Congress on Sensors","volume":"3 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":"128841497","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}
Pub Date : 2014-12-29DOI: 10.1109/IBERSENSOR.2014.6995552
Edna Melissa Valenzuela Acosta, O. A. de Fuentes, Y. Prokhorov, J. Gabriel Luna Barcenas
Chitosan-gold nanocomposite has been synthesized by the Turkevich method and the final properties of nanocomposite have been investigated using electrical impedance spectroscopy, UV-vis spectroscopy, TEM and potentiometric measurements. We explore the possibility to detect copper ions using electrical impedance measurements in a linear range of 1-60 ppm, and using potentiometric measurements in a concentration range of 1.5-2.7×103 ppm. Preliminary studies confirm that chitosan-gold nanocomposite could be use as an alternative material for the development of electrochemical sensors for copper ions detection.
{"title":"Chitosan-au nanocomposite: Preliminary studies of its potential application in electrochemical sensors","authors":"Edna Melissa Valenzuela Acosta, O. A. de Fuentes, Y. Prokhorov, J. Gabriel Luna Barcenas","doi":"10.1109/IBERSENSOR.2014.6995552","DOIUrl":"https://doi.org/10.1109/IBERSENSOR.2014.6995552","url":null,"abstract":"Chitosan-gold nanocomposite has been synthesized by the Turkevich method and the final properties of nanocomposite have been investigated using electrical impedance spectroscopy, UV-vis spectroscopy, TEM and potentiometric measurements. We explore the possibility to detect copper ions using electrical impedance measurements in a linear range of 1-60 ppm, and using potentiometric measurements in a concentration range of 1.5-2.7×103 ppm. Preliminary studies confirm that chitosan-gold nanocomposite could be use as an alternative material for the development of electrochemical sensors for copper ions detection.","PeriodicalId":296271,"journal":{"name":"2014 IEEE 9th IberoAmerican Congress on Sensors","volume":"90 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":"122488627","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}
Pub Date : 2014-12-29DOI: 10.1109/IBERSENSOR.2014.6995518
J. Cabrera-Lopez, C. A. Romero-Beltrán
Today several electronic applications are demanding linear ICs that operate on a single supply rail, with the same performance of dual supply parts. Power consumption is now the key parameter for those battery operated systems and in some instances, more important than cost. In fact, through the effort of the manufacturers, doing more with less, is possible to find notable performance OpAmp's; parameters such as the offset voltage, leakage current and the precision of the gain are increasingly improved. In addition, in applications where the low-signal processing is required, as in many of the applications above described; in some cases the use of reconfigurable circuits is necessary to improve and highlight the performance of these OpAmp's. Then, the performance of a stage can be improve on the fly. This paper presents a design approach for amplification and active filter stages, with auto adjustable features, for signal processing greater than 100 mV and up to 1 KHz. The proposed approach uses a successive approximation algorithm for setting gain stages, and algorithms based on Wavelets-Mallat discrete thresholding and power spectral density of the signal for tuning the active filters. Its implementation based on a reconfigurable mixed-signal circuit, PSoC1, is also presented and validated. The results show that the proposed helps to improve the dynamic range and SNR of a signal, without the need to redesign and implementation processes of these stages, very commons in low-signal processing. These implementation can be used in applications where signals with the above conditions, need to be conditioned. For example: biomedical and semiconductor sensor signals.
{"title":"Auto-adjustable low-signal processing technique based on programmable mixed-signal SoCs","authors":"J. Cabrera-Lopez, C. A. Romero-Beltrán","doi":"10.1109/IBERSENSOR.2014.6995518","DOIUrl":"https://doi.org/10.1109/IBERSENSOR.2014.6995518","url":null,"abstract":"Today several electronic applications are demanding linear ICs that operate on a single supply rail, with the same performance of dual supply parts. Power consumption is now the key parameter for those battery operated systems and in some instances, more important than cost. In fact, through the effort of the manufacturers, doing more with less, is possible to find notable performance OpAmp's; parameters such as the offset voltage, leakage current and the precision of the gain are increasingly improved. In addition, in applications where the low-signal processing is required, as in many of the applications above described; in some cases the use of reconfigurable circuits is necessary to improve and highlight the performance of these OpAmp's. Then, the performance of a stage can be improve on the fly. This paper presents a design approach for amplification and active filter stages, with auto adjustable features, for signal processing greater than 100 mV and up to 1 KHz. The proposed approach uses a successive approximation algorithm for setting gain stages, and algorithms based on Wavelets-Mallat discrete thresholding and power spectral density of the signal for tuning the active filters. Its implementation based on a reconfigurable mixed-signal circuit, PSoC1, is also presented and validated. The results show that the proposed helps to improve the dynamic range and SNR of a signal, without the need to redesign and implementation processes of these stages, very commons in low-signal processing. These implementation can be used in applications where signals with the above conditions, need to be conditioned. For example: biomedical and semiconductor sensor signals.","PeriodicalId":296271,"journal":{"name":"2014 IEEE 9th IberoAmerican Congress on Sensors","volume":"29 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":"122707395","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}
Pub Date : 2014-12-29DOI: 10.1109/IBERSENSOR.2014.6995563
P. Giménez-Gómez, Jordi Sacristan-Riquelme, F. Pujol-Vila, N. Santamaria, N. Vigués, C. Jiménez-Jorquera, J. Mas, X. Muñoz‐Berbel
In situ determination of enteric pathogen bacteria is essential in the prevention of a number of illnesses associated to contaminated water consumption. Current methods for this mostly depend on long incubation times (i.e. Colibert test) or poorly selective/ sensitive protocols (amperometric sensors). Based on the Colilert test, this manuscript presents a low-cost and small-size photonic lab-on-a-chip (PhLoC) containing discrete auxiliary optical elements (i.e. light emitting diodes, LEDs, and detectors) and an external electronic control system for environmental light correction. Preliminary results demonstrate the suitability of the present technology for the sensitive and selective determination of coliform bacteria. These architectures and measurement protocols open the possibility for fast in situ determination of microbial contaminants in drinking and wastewaters.
{"title":"Photonic lab-on-a-chip with environmental light correction for in situ determination of enteric pathogen contamination","authors":"P. Giménez-Gómez, Jordi Sacristan-Riquelme, F. Pujol-Vila, N. Santamaria, N. Vigués, C. Jiménez-Jorquera, J. Mas, X. Muñoz‐Berbel","doi":"10.1109/IBERSENSOR.2014.6995563","DOIUrl":"https://doi.org/10.1109/IBERSENSOR.2014.6995563","url":null,"abstract":"In situ determination of enteric pathogen bacteria is essential in the prevention of a number of illnesses associated to contaminated water consumption. Current methods for this mostly depend on long incubation times (i.e. Colibert test) or poorly selective/ sensitive protocols (amperometric sensors). Based on the Colilert test, this manuscript presents a low-cost and small-size photonic lab-on-a-chip (PhLoC) containing discrete auxiliary optical elements (i.e. light emitting diodes, LEDs, and detectors) and an external electronic control system for environmental light correction. Preliminary results demonstrate the suitability of the present technology for the sensitive and selective determination of coliform bacteria. These architectures and measurement protocols open the possibility for fast in situ determination of microbial contaminants in drinking and wastewaters.","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":"131426956","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：