Abstract
A compact optical sensor for the automatic detection of ammonia nitrogen in water was developed based on a combination of liquid-gas separation and gas-phase reversible colorimetry.The sensor consists of a sample chamber,a test chamber,aprogram-controlled sampling unit and a data-processing circuit module.The sensor performance was investigated by using a series of aqueous ammonium chloride solutions with different concentrations as the ammonia nitrogen samples.The linear relationship between the measured absorbance and the ammonia-nitrogen concentration was obtained and the high reliability of sensor was demonstrated by comparing the measured and given concentrations of standard ammonia nitrogen samples.The experimental results indicate that the sensor works continuously and automatically for a long time at a room temperature and has good repeatability.The detection limit is 0.04mg/L(NH3-N).The sensor is characterized by its smaller volume,light-weight,lower cost and power consumption,high-level automation,and it is suitable for on-site rapid detectionof ammonia nitrogen in a practical water environment.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
