Author： Tian Yuhong Jun Song Qi Hua Zhaozhe
Publisher： Taylor & Francis Ltd
ISSN： 0003-2719
Source： Analytical Letters, Vol.38, Iss.14, 2005-11, pp. : 2439-2447
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Abstract
A very sensitive and fast flow injection chemiluminescence method, based on the oxidation of humic acid (HA) by 1,3‐dibromine‐5,5‐dimethylhydantion in the presence of glycine in alkaline medium, was developed for the determination of trace humic acids in water. A wide calibration range from 0.001 to 1.0 µg mL −1 was obtained at the optimized conditions and the detection limit was as low as 0.5 ng mL −1 of humic acids. Most of the foreign substances tested showed relatively high tolerance levels and the proposed method was successfully applied to the determination of humic acid in river water and tap water.
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