Title :
The detection properties of ammonia SAW gas sensors based on L-glutamic acid hydrochloride
Author :
Chi-Yen Shen ; Chun-Pu Huang ; Wang-Tsung Huang
Author_Institution :
Dept. of Electr. Eng., I-Shou Univ., Ta-Hsu Hsiang, Taiwan
Abstract :
This study has investigated an improved surface acoustic wave (SAW) ammonia gas sensor based on L-glutamic acid hydrochloride. It presents an excellent reversibility, sensitivity, and repeatability to ammonia. The frequency shift versus ammonia concentration above 40/spl deg/C was a monotonic function, and the limit of detection of the sensor at 50/spl deg/C was 80 ppb.
Keywords :
ammonia; bioacoustics; gas sensors; patient diagnosis; surface acoustic waves; 50 degC; L-glutamic acid hydrochloride; ammonia SAW gas sensors; ammonia concentration; frequency shift; repeatability; reversibility; sensitivity; surface acoustic wave; Acoustic sensors; Biosensors; Chemical and biological sensors; Chemical sensors; Delay lines; Frequency; Gas detectors; Surface acoustic wave devices; Surface acoustic waves; Temperature sensors;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2005.1561645
