Abstract
An on-line total phosphorus (TP) analyzer was developed to meet the needs for determining the phosphonate concentration in industrial circulating cooling waters with low phosphorus and even phosphorus-free formulations and high Cl− contents. A flow batch analysis technique was used to achieve high sensitivity over a wide range of total phosphorus concentration using a home-made low-power ring-shaped UV on-line digester operating at normal temperatures and pressures and a dual-spectrophotometer detector. The quantification range was 0.36–160 μmolL−1, and the limit of quantification was low enough to detect low, and even no, phosphorus in the treatment reagents. Concentrations of chloride ions up to 700 mgL−1 in the cooling water would not interfere with the digestion. The analyzer was successfully deployed in an open circulating cooling water system. The results from the on-line system agreed well with those of discrete samples analyzed using a conventional analytical method in the factory laboratory.
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.
