A Fiber Optic Ammonia Sensor Using a Universal pH Indicator
A universal pH indicator is used to fabricate a fiber optic ammonia sensor. The advantage of this pH indicator is that it exhibits sensitivity to ammonia over a broad wavelength range. This provides a differential response, with a valley around 500 nm and a peak around 650 nm, which allows us to pe...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2014-02-01
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| Series: | Sensors |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1424-8220/14/3/4060 |
| _version_ | 1817996889769902080 |
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| author | Adolfo J. Rodríguez Carlos R. Zamarreño Ignacio R. Matías Francisco. J. Arregui Rene F. Domínguez Cruz Daniel. A. May-Arrioja |
| author_facet | Adolfo J. Rodríguez Carlos R. Zamarreño Ignacio R. Matías Francisco. J. Arregui Rene F. Domínguez Cruz Daniel. A. May-Arrioja |
| author_sort | Adolfo J. Rodríguez |
| collection | DOAJ |
| description | A universal pH indicator is used to fabricate a fiber optic ammonia sensor. The advantage of this pH indicator is that it exhibits sensitivity to ammonia over a broad wavelength range. This provides a differential response, with a valley around 500 nm and a peak around 650 nm, which allows us to perform ratiometric measurements. The ratiometric measurements provide not only an enhanced signal, but can also eliminate any external disturbance due to humidity or temperature fluctuations. In addition, the indicator is embedded in a hydrophobic and gas permeable polyurethane film named Tecoflex®. The film provides additional advantages to the sensor, such as operation in dry environments, efficient transport of the element to be measured to the sensitive area of the sensor, and prevent leakage or detachment of the indicator. The combination of the universal pH indicator and Tecoflex® film provides a reliable and robust fiber optic ammonia sensor. |
| first_indexed | 2024-04-14T02:30:13Z |
| format | Article |
| id | doaj.art-a0d426f67d124e00a70f87885b2188a4 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-14T02:30:13Z |
| publishDate | 2014-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-a0d426f67d124e00a70f87885b2188a42022-12-22T02:17:44ZengMDPI AGSensors1424-82202014-02-011434060407310.3390/s140304060s140304060A Fiber Optic Ammonia Sensor Using a Universal pH IndicatorAdolfo J. Rodríguez0Carlos R. Zamarreño1Ignacio R. Matías2Francisco. J. Arregui3Rene F. Domínguez Cruz4Daniel. A. May-Arrioja5Fiber and Integrated Optics Laboratory, Electronics Engineering Department, UAM Reynosa Rodhe, Universidad Autónoma de Tamaulipas, Carr. Reynosa-San Fernando S/N, Reynosa, Tamaulipas 88779, MexicoDepartamento de Ingeniería Eléctrica y Electrónica, Universidad Pública de Navarra, Edif. Los Tejos, Campus Arrosadia, Pamplona España 31006, SpainDepartamento de Ingeniería Eléctrica y Electrónica, Universidad Pública de Navarra, Edif. Los Tejos, Campus Arrosadia, Pamplona España 31006, SpainDepartamento de Ingeniería Eléctrica y Electrónica, Universidad Pública de Navarra, Edif. Los Tejos, Campus Arrosadia, Pamplona España 31006, SpainFiber and Integrated Optics Laboratory, Electronics Engineering Department, UAM Reynosa Rodhe, Universidad Autónoma de Tamaulipas, Carr. Reynosa-San Fernando S/N, Reynosa, Tamaulipas 88779, MexicoFiber and Integrated Optics Laboratory, Electronics Engineering Department, UAM Reynosa Rodhe, Universidad Autónoma de Tamaulipas, Carr. Reynosa-San Fernando S/N, Reynosa, Tamaulipas 88779, MexicoA universal pH indicator is used to fabricate a fiber optic ammonia sensor. The advantage of this pH indicator is that it exhibits sensitivity to ammonia over a broad wavelength range. This provides a differential response, with a valley around 500 nm and a peak around 650 nm, which allows us to perform ratiometric measurements. The ratiometric measurements provide not only an enhanced signal, but can also eliminate any external disturbance due to humidity or temperature fluctuations. In addition, the indicator is embedded in a hydrophobic and gas permeable polyurethane film named Tecoflex®. The film provides additional advantages to the sensor, such as operation in dry environments, efficient transport of the element to be measured to the sensitive area of the sensor, and prevent leakage or detachment of the indicator. The combination of the universal pH indicator and Tecoflex® film provides a reliable and robust fiber optic ammonia sensor.http://www.mdpi.com/1424-8220/14/3/4060fiber optics sensorammonia sensoroptical sensor |
| spellingShingle | Adolfo J. Rodríguez Carlos R. Zamarreño Ignacio R. Matías Francisco. J. Arregui Rene F. Domínguez Cruz Daniel. A. May-Arrioja A Fiber Optic Ammonia Sensor Using a Universal pH Indicator Sensors fiber optics sensor ammonia sensor optical sensor |
| title | A Fiber Optic Ammonia Sensor Using a Universal pH Indicator |
| title_full | A Fiber Optic Ammonia Sensor Using a Universal pH Indicator |
| title_fullStr | A Fiber Optic Ammonia Sensor Using a Universal pH Indicator |
| title_full_unstemmed | A Fiber Optic Ammonia Sensor Using a Universal pH Indicator |
| title_short | A Fiber Optic Ammonia Sensor Using a Universal pH Indicator |
| title_sort | fiber optic ammonia sensor using a universal ph indicator |
| topic | fiber optics sensor ammonia sensor optical sensor |
| url | http://www.mdpi.com/1424-8220/14/3/4060 |
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