Two simple and sensitive methods for rapid determination of hydrazine in water are described, based on the inhibition effect of hydrazine on the reaction of oxyhalogen ion +halogen ion (X − ) with rhodamine B in an acid medium. It is found that the linear range and the detection limit for the determination of hydrazine are 7.88–78.8ngmL −1 and 1.7ngmL −1 , respectively, in the system of potassium chlorate in hydrochloric acid. They are 3.49–78.8ngmL −1 and 0.81ngmL −1 , respectively, in the system of potassium bromate+potassium bromide in sulphuric acid solutions. Recoveries are in the range of 94–104%. A comparison was made for the analytical characteristics of different methods, and a possible reaction mechanism was proposed.
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Kinetic fluorimetric method
Document Type: Research Article
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, Guangdong 510640, People's Republic of China
School of Chemical and Environmental Sciences, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China
November 15, 2006
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