TY - GEN
T1 - Fiber optic ammonia sensor using bromocresol green pH indicator
AU - Rodríguez Rodríguez, Adolfo Josué
AU - May-Arrioja, Daniel Alberto
AU - Domínguez Cruz, René Fernando
AU - Ruíz Zamarreño, Carlos
AU - Matías Maestro, Raul Ignacio
AU - Arregui San Martín, Francisco
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/12/12
Y1 - 2014/12/12
N2 - In this wok we report a fiber optic sensor for the detection of ammonia at low level concentrations by means of the utilization of as colourimetric pH indicator, Bromocresol Green (BCG), attached to the optical fiber. BCG is immersed into a hydrophobic and gas permeable polyurethane film named Tecoflex® that acts as a trapping matrix. Highly reproducible and reversible fiber optical sensors have been obtained employing a simple and quick dip-coating fabrication process. BCG pH indicator takes advantage of the basicity of ammonia and exhibits a wide spectral response (500 nm-750 nm) while showing recovery times of less than 15 s. On the other hand, the hydrophobicity of the Tecoflex® film provides additional advantages, such as operation even in extremely dry environments, efficient transport and leakage or detachment of the BCG pH indicator prevention. The combination of the BCG pH indicator and Tecoflex® film provides a reliable and robust fiber optic ammonia gas sensor suitable to be used in real applications.
AB - In this wok we report a fiber optic sensor for the detection of ammonia at low level concentrations by means of the utilization of as colourimetric pH indicator, Bromocresol Green (BCG), attached to the optical fiber. BCG is immersed into a hydrophobic and gas permeable polyurethane film named Tecoflex® that acts as a trapping matrix. Highly reproducible and reversible fiber optical sensors have been obtained employing a simple and quick dip-coating fabrication process. BCG pH indicator takes advantage of the basicity of ammonia and exhibits a wide spectral response (500 nm-750 nm) while showing recovery times of less than 15 s. On the other hand, the hydrophobicity of the Tecoflex® film provides additional advantages, such as operation even in extremely dry environments, efficient transport and leakage or detachment of the BCG pH indicator prevention. The combination of the BCG pH indicator and Tecoflex® film provides a reliable and robust fiber optic ammonia gas sensor suitable to be used in real applications.
KW - Ammonia sensor
KW - Optical fiber sensor
KW - PH indicator
UR - https://www.scopus.com/pages/publications/84931079076
U2 - 10.1109/ICSENS.2014.6985210
DO - 10.1109/ICSENS.2014.6985210
M3 - Conference contribution
AN - SCOPUS:84931079076
T3 - Proceedings of IEEE Sensors
SP - 1146
EP - 1149
BT - IEEE SENSORS 2014, Proceedings
A2 - Arregui, Francisco J.
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 13th IEEE SENSORS Conference, SENSORS 2014
Y2 - 2 November 2014 through 5 November 2014
ER -