Experimental Analysis of Determining Catechol in Environmental Water Samples by Flow Injection Chemiluminescence

This paper summarizes the basic principles of flow injection chemiluminescence（FICL） by literature review, identifying its five key technical features: rapid analysis, high precision, automation, low noise, and low cost. The experimental process for determining catechol using this method was also analyzed. The results show that adding silver nanoparticles（AgNPs） to a luminol-potassium ferricyanide chemiluminescence system enhances the luminescence intensity. The linear range for catechol detection was determined to be between 5.0×10^-5 mg/L and 1.0×10^-2 mg/L, with a detection limit of 4.8×10^-5 mg/L. The relative standard deviation for 11 consecutive measurements of 8.0×10^-4 mg/L catechol was only 2.3%. This indicates that the method can meet the high-precision detection requirements for catechol in environmental water samples and confirms its applicability in water environment monitoring.