Determination of Nitrite in Water with Flow Injection Chemiluminescence Method

A new chemiluminescence method for the determination of nitrite in water is pres ented. This method is based on nitrite reaction with hydrogen dioxide solution w ith catalyst acid to create peroxynitrous acid. Peroxynitrous acid reacts with a lkaline solution of luminol, producing chemiluminescence. The linear range for n itrite is 3.3×10 -3 to 3.3 μg/mL with a detection limit of 1.6×10 -3 μg/mL, and the relative standard detection is 1.03% for 0.17 μg/mL NO - 2 and 4.38% for 0.017 μg/mL NO - 2. This method has obtained satisfactory r esults in the analysis of natural waters.