Abstract
A simultaneous determination method for ammonia and humic acid in water based on the chemiluminescence method was developed. Ammonia was separated by a porous Teflon tube (in a double tube), and separated ammonia was reacted with hypobromite to produce chemiluminescence. By using the synergistic enhancement effect of humic acid for the chemiluminescence, a detection limit for ammonia of 0.41 μmol dm-3 was obtained without any interference from other compounds. Humic acid in the remaining solution coming out from the double tube also reacts with hypobromite to produce chemiluminescence. Ammonia interfered with this chemiluminescence, but the effect was saturated at ammonia concentrations higher than 1 mmol dm-3. The slope for the calibration graph of humic acid was not affected by ammonia concentration, but the value of the intercept for humic acid increased depending on ammonia concentration. Therefore, if the ammonia concentration is known, the humic acid concentration can be determined. The detection limit for humic acid was 1.1 ppb. The present method was applied to the measurement of natural water, and the results obtained by the present method were consistent with those obtained by ion chromatography for ammonia and another reported chemiluminescence method using N-bromosuccinimide for humic acid.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.