Impact of Film-Forming Amines on the Reliability of Online Analytical Instruments

摘要

There are very few reports describing the effects of the dosing of film-forming amines (FFAs) on the online monitoring equipment. This paper describes controlled, laboratory-like tests performed to ascertain the impact of three different brands of film-forming amines on system parameters. Specific conductivity, pH drift, cation resin retention, pH stability, sodium step response, sodium calibration, oxygen sensor response and ORP probe response were considered. While with some measurements no negative influence could be observed, with other equipment there was a loss of sensitivity and Speed of response time due to coating effects. There were also differences in some results depending on the FFA used.