Method for measuring total concentration of EDTA (Ethylene Diamine Tetraacetic Acid) in EDTA chemical cleaning solution of power station boiler

• Main Authors: ZHU TAO, DANG ZHIJUN, WEN HUIFENG, WEI CHENGJUN, LONG GUOJUN, LIU YONGBING, ZHANG HENG, LI SHUANGPEI
• Format: Patent
• Language: Chinese; English
• Published: 05.12.2023
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a method for measuring the total concentration of EDTA (Ethylene Diamine Tetraacetic Acid) in a power station boiler EDTA chemical cleaning solution, and relates to the technical field of power station boiler chemical cleaning, and the method comprises the following steps: adding a masking agent, destroying an original EDTA-Fe complex, and titrating the decomplexed EDTA with a Zn < 2 + > standard solution by taking acid chrome blue K as an indicator, so as to obtain the total concentration of EDTA in the chemical cleaning solution. The method provided by the invention solves the problems of tedious and time-consuming operation steps and poor result accuracy of a traditional alkalization separation method, also solves the problems of poor masking effect of a masking agent and low measurement result caused by the masking effect of the masking agent on Zn < 2 + >, and has the characteristics of high detection result accuracy, simple operation and high detection speed. 本发明公开了一种电站锅炉EDTA化学清洗